Bad customer service

I was offered price lock on my access services and on December I called and asked to up my services to compact only for one month and the consultant said when I down grade to access I will still get the price lock because it is for 2 years but to my surprise I January when they debited R159 instead of R128. When I called and asked the consultant said she will lock a call with price lock department but I'm still waiting and nothing is happening.