FAULTY REPAIR AND STILL NO PHONE BACK OR A REFUND

On the 7th November at the advice of Samsung I was told to use Dionwired for a possible repair to my Samsung S7. I advised the technician on duty that day that my phone was out of guarantee/warranty. I explained that it didn't want to switch on. He advised either the battery or motherboard needed replacing, I requested a quote and informed him it would be too expensive to replace the motherboard, but was prepared to replace a battery. As he took my phone he looked at it and commented that the back cover was slightly raised and he was almost sure it was the battery. I was advised 3 days and I would be able to collect my phone and pay. Two and a half weeks later I still didn't have the phone, I left for a business trip to JHB and asked my daughter to collect and pay for it, which she did. I got back switched the phone on, battery was sitting at 4% and that's all I managed to do was switch it on before it died again. Couldn't get it to switch on again. I was leaving for holiday, so returned to the store the first week of January, advised the same technician the problem, he advised would have a look at it again. Again another few weeks went by, no calls, no emails, absolutely nothing. About 4 weeks back I went to the Canal Walk store again, spoke to the manager on duty, he was horrified it had taken so long, I am still waiting for his call to this day as well. I had reiterated to the manager that if the phone's problem was a motherboard, why was my battery replaced, why was the phone not checked before releasing it after the battery was replaced. If they had made an error in ascertaining the problem and it is the motherboard, then the manager agreed with me it is a case of returning my phone- with my own battery(which they still have in their possession) and refunding my R745 they charged , which is clear by now because they can't get the phone fixed without replacing a motherboard- or so the say. Quite simple. Yet to this very day I have not had one phone call from Canal Walk regards any of the above. Their lack of efficiency, customer service, blatant ignorance to escalating this matter is appalling to say the least. We are now sitting in April- that's 5 months this matter has carried on with them. Unbelievable!!!