5 Months for a Repair charges R3000 and no phone

My phone was booked in for repairs from the Nicolway centre on 4th May, received at repair center 6th May I phoned the store and customer care countless times to find out what was happening and get a quote. I finally got a quote which I accepted telephonically with a customer care person. After weeks of nothing happening and phoning multiple times they told me the quote had not been accepted. I accepted again and got a message that my phone was on the way to Nicolway 28th July. I fetched the phone to find it was still not working. After much fighting and no calls back from customer care a courier came to fetch my phone on 6th Aug... after many more calls customer care said they cant help and asked me to call repairs, repairs could not locate my phone for at least 2-3 weeks. They said the find my iphone was on... I disabled this. Again multiple calls, they try to tell me its on again.. multiple calls saying they will expedite, still sitting waiting for a quote.... in the meantime I receive a R3000 bill for the repair. I can not get any answer on when I will get my phone back. 4 months this is ridiculous, no accountability. I will be cancelling my contract when up for renewal.