FNB the ultimate dissapointed

So I've used fnb connect for just over a year (unlimited calls/4000 minutes for R399) and suddenly I start experiencing problems that I can not dail out or I have to dail the no 10 to 20 times to get through. Phoned FNB and they "investigated", I've gone through all possible procedures also the ones they recommended but still nothing ... so here is the highlight, when I cancelled and went to pre paid after a few weeks of frustration and a lot of calls to fnb ... just like that it was working perfectly on pre paid ??????? Is that not strange, please watch out. I requested my last payment to be reversed but it was a NO , regardless being a loyal client or maybe number for so many years with investments, policies and so much more.