Worst service experience

My phone had liquid damage when I took it to MTN midrand HVRC. They took my phone in and told me that I had more than liquid damage and had to pay about R700 for the repair. I handed the phone in and 2 weeks later after repeatedly trying to get a hold of them I had to drive there again. The phone was finally given to me and they told me top claim back from my insurance 24 hour mobility. I did that and was asked to pay an excess of R150 to repair the phone...But the phone was repaired??? and I paid MTN that amount. I still have the phone and when it falls from a 2mm height it switches off now, the phone gives me a sim car error message where it has to restart itself, and the phone wont even take my sd card. This is my business phone and I do not carry another phone with me hence the reason why I pay for the contract and insurance. <br> I have ben very patient about this and I cannot anymore, this started on the 28th of February and we are now in June. I just called the HVRC centre. Voice recorder says the working hours are from Monday - Friday 08:00 to 17:00 Goodbye.....The time of my call was 16:30