Autopage Poor service

My cellphone contract was purchased late last year (September), and I had problems ever since. By November I had to do a SIM swop after the phone was sent for repairs to Samsung contact centre and wasn't resolved. The problem started again 'no network available' in February, sent phone to Samsung service centre again, and they said that the phone isn't the problem it's the SIM. After several failed attempts to locate an active Autopage branch in Durban, I was directed to the hub at Riverhorse Valley. Did another SIM SWOP 04/03/16, no network still. Called Autopage twice on phone this morning, cut me off after 8mins and 12mins respectively. The last communication was to try the SIM on another device to check if SIM is the problem, did this and it didn't work!! It's been almost 3.5 weeks since I couldn't make or receive calls. I'm really frustrated, as every person I've dealt with at Autopage have been of no help, its the inconvenience of my taking time off from work to sort out issues that I shouldn't be having. If the SIM is the problem, this will be the 4th SIM card from start of contract! I'm so glad that the contracts are moving over to their respective service providers.