Complaint against oppo mobile damaged by service center Jodhpur Rajashthan

Myself Mohish bhati Hometown Jodhpur Rajashthan I have purchased my new oppo F1s phone on 5th oct 2016 and i was so happy after a long time i have purchased a new mobile i using it till 17th oct 2016 suddenly i got some automatic working issues in touch in my mobile i gone to service center on 19th oct 2016 in morning and tell them about my issue that it is working automatically when i touch my phone please checked it properly they told me come back in evening we will tell u what exactly the problem in your mobile,so i came back in Evening and the told me the mobile which is using by me having liquid issue and touch is damaged so it will cost you around 4100 INR i refused that damaged because i wont believe that but they told me that your oppo F1s phone have liquid damaged and your touch not working so we have to change it i was so sad because i wont done anything wrong to my mobile but lastly i was agree for make my phone repaired as soon as possible so i was agree to do pay 4100 INR because i want my mobile phone again in a working condition and they create a job sheet of my oppo mobile and fill all details perfectly by a Engineer of OPPO mobile and written the handset condition is GOOD Everything is GOOD warranty is VOID and ELS Status Liquid Damaged , problem Reported in that touch is not working and they told me your mobile phone will came back AFTER 1 week so you have to wait then after 1 week i just gone in service center they told me the touch panel still not came yet whenever it arrive we will done our work and will give your mobile phone and make a call to the customer care of oppo so they can provide your touch as soon as possible then i call them and they told me your touch panel will come soon because it is come from China and from Several times of checking that it is working properly or not so they tell me you have to wait i was waiting from last 20 days and again i call them several of times even visited to service center also they told me it still came yet and now after 23 days when i gone there they tell me a new thing that your mobile motherboard is damaged and your mobile touch is working you have to pay 12000INR for Motherboard and for your touch panel it was totally Fine Now they asking me to pay for the repairing amount RS 12000 so they told me to pay 12000 INR for that mobile i was to disappointed that how could the charge me even my phone was in working condition before even everything is GOOD as they wrote in JOb sheet of mobile after listen that things i was totally sad and unhappy and having so much tension how could they said after 23 days that pay for wrong things even done nothing I am totally sure they damaged my motherboard because when I gave them my phone only having touch problem now they said your phone is dead how could I believe even have a Warranty also for 1 year even i wont done anything wrong it is impossible to pay such a huge amount because 18000 INR oppo new phone i just collected money in 7 months to purchase this phone i am so sad so my friend told me about your website please help me please god will help those who help peoples please sir / mam help me I am helpless person.
Pleasee help me

MY oppo JOb Sheet number :OPAFRJ009160919J101
My IMEI number : 861171035093639
Handset Colour : Gold
Date of Purchase : 05 oct 2016
JOb sheet created in Service center : 19 Oct 2016
Warranty Status : VOID
ELS status: Liquid Damaged
Date of purchase 05-09-2016