Very slow to no Internet

Since December we have been experiencing extremely slow network to no network. We have logged numerous support tickets from the app but nobody gets back to you...nobody even bothers to take calls...the 1st 3 months was exceptionally good service but than slower and slower network speeds to currently no internet...oh but debiting your account for the monthly bill is done very fast...since I have not been getting any feedback from their Support tickets this is a last resort before changing suppliers. Rain you have a week to improve your service delivery before loosing another client...as for the reviews here 21k bad reviews speaks volumes. 1 star is too much at this stage.