Still waiting

I phoned on the 14th wanting my APN settings giving to me over the phone. The call centre staff says they don't have it but will get the technical office to phone me..... I am still waiting for the call. Instead I get messages saying my SIM has been reset and if that doesn't work they can't help me I must go to a branch to have my settings reset. Numerous calls to them trying to explain that I just want the APN settings to enter them myself, I don't want anything reset and I am still waiting for the call. I had 2 missed calls (on the device that didn't work) and as I have 3 contracts with them they can't say they did all to get hold of me. After 8 days I phoned a branch and was helped in 2 minutes so can't understand why 15 days later I am still waiting for the tech's to phone. I don't need them anymore but shocked that I am still waiting for a call.