MTN - No respect for existing customers!

I went into MTN canal walk last week to enquire about an iPhone 7. They loaded all my details and told me I would need to have a credit check done and I can go walk around the mall until I receive the sms which I had no problem with. I walked around for about 15 min when the power cut out (which is uncontrollable). I decided to leave canal walk and wait for the sms which did arrive while on my way home - to Greenpoint. The sms said: "Congratulations your MTN application has been conditionally approved, please wait for a call from dealer". Well I waited and waited and no one bothered to call. I then went back to canal walk last night 10/12/2018 to find out what was happening, only to be told there is no stock. I have been with MTN for many years and as much as I "love" driving up and down to run after MTN I find this unacceptable!! I already have a data contract with MTN which I now cannot wait for it to end as I will be going back to the same network I left previously to join MTN against better judgement!!! Im not sure how you can be so negligent towards clients that spend hundreds, if not thousands of rands with you!