Waiting for a response for more than a week.

I have a problem with my uncapped LTE package. I have called the call center, but the technical department does not seem to be of any help. They said they logged a fault and will call me within the next 72 working hours. It has been more than a week later and I have not received a call yet. <br> <br> I do not mind calling them, the problem is, I hold for half an hour and then the staff are not competent enough to even understand my problem. <br> <br> Please inform your staff of your new products and how the work.