Pathetic service from cell stores and call center

I currently have 3 contracts with cell c. 1 was upgraded in November and I have 2 contracts that are currently due for an upgrade. Knowing these contracts are due for an upgrade,I intended to wait for an iPhone. I was called several times by the upgrades department and several stores where they insisted I do an upgrade. I was then called by Candice from west street cell c in Durban CBD who advised me to do my upgrade with her and she was supposed to get back to me about the iPhone. To date I have no feedback. I then called Ryan Nundlall from the Gamecity Cellc in city view mall as he said he would definitely get me the iPhone and he just needed me to fill out a credit vet consent form so that he could order the device as his store did not have stock. I waited for a week and received no feedback until I called the store asking to speak to Ryan who then informed me that my credit limit on my account is only R80 and he was sending through a motivation to pick up the credit limit. As mentioned I have 3 contracts which add up to R1200 per month but now cell c tells me I cannot qualify to upgrade the remaining 2 lines yet other service providers are offering me a device that I am interested in. I have received terrible service from cell c and I am looking at cancelling all contacts with this useless provider which I have been using for 8years