Very bad signal and Internet connection

Hi there<br> <br> We moved into a new place at the beginning of Feb. Since we have moved in both me and my girlfriend have been getting bad signal and very low Internet connection ( most of the time on edge and sitting below 100 KB/s)also our signal drops to nothing constantly.I have had our phones tested and nothing wrong with them. I have also noticed a severe lack of speed across your network wherever we go. Please can we get some answers and or solutions. Otherwise could you cancel my contract and I'll move over to someone that can give me what I pay for.