Hello!

3 months ago a technician came to install my router. The installation was done but my internet was not working. I was calling almost every week o2 trying to figure out what the problem was. Of course me not speaking that good German was not helpful at all. Finally I managed to make an appointment with a technician for the 13th of February. But all of a sudden on 10th of February my Internet just started working. I was so excited and I thought that the problem was solved in a way so I called and cancelled the appointment. Apparently it was too late to cancel and while I was at my work I later found out that the technician came and didn’t find me which made me feel really bad for him. When I came back home I had lost my Internet again! I called and if I understood correctly an other appointment will be booked for me soon. 

My question is: How is it possible after 3 months of waiting and trying my Internet just started working by itself perfectly for 4-5 days (although in my o2 account it still says that the activation isn’t done yet) and just like that it was off again? Is there a possibility that something else is going on and that the technician will not be able to help me? 

I would really appreciate an answer from an expert or from people who maybe had the same issues.