VOX you are shocking!

I have to say that I have had such shocking service from VOX. I pay for a 100MB pipe, sole user, the internet is most of the time, under maintenance and as slow as when I had a 25MB pipe! then when you try and get it sorted or ask to buy a booster for upstairs, a month later, there is no response even after about 3 emails. I will look to get out of my contract with VOX and I will NEVER EVER Deal with them again and I sure as hell won't ever recommend them.