Disappointed in my contract upgrade process!

I was due for an upgrade in June hence received calls from mtn in May. I wanted to keep my package the way it was but was told that bundle was no longer available. I accepted the changes however when it came to loading the package, I didn't get what I agreed to plus it was more expensive on my statement! I Called Mtn last Thursday. I was told that my old deal is available and cheaper. I was elated! However.....the new 5 security questions kept failing and I wasn't able to change. We tried atleast 6 times and I failed. I am all for security updates but they should work. I was told I would get a call back the next day (aka last Friday) and I am still waiting!

What poor service from Mtn , I am so disappointed I am being charged more than I should!