Shocking service

On the 15/5/15 mtn Insurance collected my phone (Sony Xperia Z1) for repairs. Till to date, I have no idea as what is happening with my phone's repairs. I have received a letter from the insurance department on the 08/06/2015 to pay the excess of R150, the balance will be covered by the insurance. This I have paid on the 25/06/15. Everytime I call the department, one cant get hold of the department as you hold on the line forever with no answer or line just gets dropped, there one have to start all over again. Meanwhile I have upgraded my contract, since I have not received my previous handset back. I want to know what is happening to the repairs of my phone and when will I get it back????<br> <br> Claim ***<br> <br> I have also logged another complaint (***) with customer services regarding discrepancies on my tax invoice and statement on a monthly basis whereby the two invoices dont equal to the same amount. (this is on my previous contract before my recent upgrade) till today no feedback was giving to me. I want to know why I had to pay more on a monthly basis, want to be credited for the differences paid .