Erratic internet signal

<p>Since November 2016 (except for 3 weeks in December) signal jumps between Edge and HSDPL. Result is that if you get connected you get disconnected at any time . Highly frustrating to have a service you pay for but cant use as supposed to. Reported to them. First passed on from person to person and then they promise me the so called technical people will phone me within 48 hours. In the meantime I basically sit without internet!! and they dont care!!!. On top of that I am still waiting for that call after 3 days!!! When I ask them how I can cancel all 4 contracts I have so that I can move to another service provider they cannot tell me how to do it. ?????</p>