Bad after service

I bought a Hisense U962 phone from Ackermans Mall of Africa on the 30th of August 2017 on receipt 1429- ********** 8362, the phone started giving me problems and I took it back for repairs at Ackermans Forest hill on the 27th of September 2017, I was promised an lead time of 21 days for repairs from 3G mobile as they were the ones going to fix the phone. On the 24th of October I was at Forest Hill mall and decided to go check the progress of the phone and I was shocked when they told me that the phone is still at the shop and that 3G Mobile hasn't come and collected the phone. The lady that 1st helped me when I took the phone for repairs has been transferred to another branch and Dorcus assisted me. She filled in a new form for 3G mobile so they can come and collect the phone for repairs. A month passed and I went back to Ackermans for a follow up and I was told that 3G mobile returned the phone as they said they are not ones that will be fixing the one. Dorcus tried calling the other service provider that must fix the phone and she would not get through as there was problems with their phones. I ended up giving Dorcus my phone to use to call them and could not give her an ETA on when the phone be back. It has now been 3 months and 2 weeks since I took my phone back and still haven't received any call for a feedback and I have since bought another phone. I am really disappointed in the after service from Ackermans. The phone serial number is ********** ********** 9. I have now stopped going to the store for updates as I keep wasting my time and petrol going there for nothing.