Very dissatisfied MTN-customer

I signed up for a MyChoice 350 contract from MTN, where I receive 350 free minutes,300 free sms's and 500Mb of data on the 27th of each month. On 27 Nov I only received minutes and data, and on 1 Dec I visited the Bothaville-branch to lodge a query.The lady lodged the query and said she will contact me.After two weeks, on 15 Dec, I visited the branch again as I did not receive the sms's yet or any feedback from the branch.According to the system the query was resolved and closed,..The lady re-opened the query and promised to contact me as soon as she has any news. On 27 Dec I received my monthly minutes and data, without the free sms's. This means that I paid R349 for Nov and again Dec without receiving the full package : BREACH OF CONTRACT. If I don't pay the R349 p.m. my phone will be disconnected, but I must pay for services that are not provided.