Bad Service

I was recently contacted by Mobile Plus which is a 3rd party subsidy of MTN. I took my upgrade with them, only for the wrong colour phone to be delivered. I then called Mobile Plus, MTN call center and was transferred back and fought eventually visted an MTN store of which they were also not able to assist, later on called mobile plus and was advised they cant collect the phone to please take it to an MTN store. The following day i took the phone back to Edenvale MTN store where a collection number was given. I then called Mobile Plus the Monday and was told to send an email, same was done. I was advised that cancellation hasn't been processed as yet as they awaiting and RMA number. I have been following up daily, only to be told it will take 2 to 4 weeks. I was recently credited with the minutes, data and SMS which i was avoiding. If my phone bill is high i will be very upset. My bday is coming up and still no cancellation, no new phone. i am highly frustrated.