Unacceptable behaviour from cell c repair center. Phone was sended back NOT FIXED.A cellphone repair shop fixed it for R250.No liquid damage

2 months back I handed my Samsung galaxy in for not charging.Cell C reviewed that there was liquid damage on my phone and i told them that it is a lie and poor service after they have quoated me R1800 for the repair.Liquid damage is unrepairable..............I asked to get my phone back and took it for a second opion where the cell repair shop fixed my phone for only R250 changing the charging connecting block and NO LIQUID DAMAGE.....When i swiched my phone on i found that my data for 2 months and airtime was taken and not pulled over as my phone was off for the period of 2 months.And the main issue was that my phone is still under warrenty...?Look how sevice providers bull**** there clients.UNACCEPTABLE FROM CELL C.I WILL FINISH MY CONTRACTS AND CANCELL ALL 3 OF THEM.