Breach of contract and agreement

My sim card gets blocked I called technical department where I was advised to buy a new sim card at an expensive price amounting to R150 and I was told that the new sim card is going to be activated 24 hours after delivery which was on the 27/11/2018. Activation of the sim card is not done up to date and I called Mweb to find out why sim card is not activated as per agreement whereby did spend R600.00 airtime to find out. I have been taken pillar to post without finding exactly why the sim card is not activated. Upon all I am still billed as if I am getting services as per contract even though it is not like that. please help me .