MTN contact upgrade

i was due for a upgrade on the 1 May 2015 and went to MTN N1 City where i was asked all the relevant questions to do the upgrade. The had to get me the Samsung S6 Egde and was told that it will be there on Monday 11 May 2015. I went to the store on Monday and was told that i could not get the phone due to MTN onlt gives me a credit limit of R1000.00 and i will be over that for the new contract and my Table contract and then the add R105.00 once off payment for upgrade. They then said they will apply for more credit and went along with upgrade. I phone the call centre and was told i do not quilify for more credit but recieved sms that upgrade went through now my phone is suspended can't use it trying to phone the 808 today nine time and each time waiting for 10 - 20 minutes with no help. After 18 years with MTN this is what you get.