CONTRACT NOT EXPLAINED AND USELESS

I upgraded in January this year. At the time I was told I will receive free 200 free minutes and not R200.00 as before. I use my mobile to call family in NZ and AUS. I am unable to do so with free minutes. When I queried this with MTN in Somerset West they put me on roaming - I knew that wasnt the problem. I then went to Somerset Mall 3 times and they eventually discovered that i cannot call overseas with free minutes. They could not migrate back to the old package as i had'nt upgraded with them. I went to Somerset West and have now been trying to get back on to the old package for 6 weeks. WHY WHY cant MTN answer the emails from MTN in Somerset West. Patricia has been authorised to do it but cant from her side - MTN has to do it and NO ONE from there is responding to emails. I called customer care today ***) and they cant help me ( Mcombi ). What is my next move ? I have never had such bad service from any company before. I have wasted so much time sitting waiting for consultants - or waiting for the phone to be answered. I want this fixed at NO COST TO ME as it was not explained that i cant call overseas with free minutes. What a joke and a *******. I'm truly disgusted.