Unsatisfactory service

My sim card was delivered on the 04th or 05th June , I called the customer care number to activate the sim on the 06/06/2018. I was told it would take 72 hours to be activated. On the 11 June I called again to query why the sim was not activated, I will told that it was not sent to MTN to be activated however they will do so immediately. This would then take another 72 hours. On the 14/06/2018 sim is still not activated. I contacted the customer care number again and I was told that the request for activation was only sent on the 13/06/2018. I then requested the contract to be cancelled as I am having problems and the sim has not even been activated. I was told to email the one2one customer care as they cannot assist me with that. The email was sent, I got an automated response saying that I would receive a response within 8 hours. I phone this morning 15/06/2018 again as no response was received only to be told that there is a delay with the activation's and the sim would only be activated within next week. Activation takes about 6 days. I find this unacceptable and unprofessional. Is this the type of Service that I would receive going forward. Please cancel this contract with Immediate effect.