Bad Service

I've tried to contact the call center. On hold for almost 30 minutes I gave up. I've send a request on the website for them to call me - receive sms that they will contact me within 24 ours. This did not happen. Still waiting. I've got 2GB on my router. On the 7th of April there was nothing left - impossible!!! This happened quite a lot the last couple of months. Before that I always had some data left at end of month. Now all of a sudden I used everything in the first week??? I only use it to check facebook in evening and sometime check emails and read the paper. I really hope they will get back to me with proof of what happened to my data.