Webcall doesn't manage service issues

Via Webcall I upgraded my Amobia Line from 2Mb/s to 4Mb/s in Jan and its been a disaster since.<br> My contract is with Webcall and they refuse to manage any connection issues.<br> <br> Since the 4th of Feb I've had outage and extremely slow speeds yet Webcall/Amobia takes there money every month. I've continuously reported issues to Webcall and Amobia and I still don't receive my contracted speeds, generally