Disgusting service

for the past 4months I have been paying for the service that I'm not getting. I have 2 exploras and I have been taken from pillar to post and the latest is that they have now blocked my emails while I'm a paying customer. None of my exploras have working pvr features, I have been to 3 of their walk in centres and have hired their accredited technicians all these I'm paying but service there is none. what is disgusting is my money they want but no service at all.