Repair Centre poor service

My Iphone 7 just stopped charging in August 2019, i then immediately took it in for repairs at the MTN store in Jabulani mall. MTN repair center returned the Phone without fixing it and stated that i should switch off the Icloud the repair center didn't try to contact me while the phone was at they possession instead they returned the phone not repaired. at this time I was heavily pregnant i took my phone from the store and was booked in to hospital for a Emergency C-Section. on the 20th of December 2019 i took my phone to an MTN store in Mall of Africa for the Phone to be repaired was assisted by Tumi who took in the Phone he then advised that the courier company has closed for the Christmas season and will reopen on the 3rd of January 2020. end of January i receive an sms stating that i should pay for the repairs i declined the payment by SMS. a week later i receive a call from Tumi stating that the repair center refuses to repair the phone because i have brought the phone when it was out of warranty. but when i brought the phone the first time it was within the warranty period of the cellphone and when i brought it the second time it was still within the warranty period.

I have been a customer of MTN for more that 10 year and the service i'm receiving here is horrible and totally unfair. i haven't had a phone for the past 6 months but i'm ****en paying my contract. my request is as follows i want to be reimbursed for these 6 months and my contract to be terminated with immediate effect.