Thanks to all who gave help.
The local internet company I have been trying to deal with have been a nightmare. I told them from the outset that my home had concrete floors and walls due to being real old, and they said that would not be a problem. Truth was that they could not resolve coverage without boosters all over, so I have let them go. Back to BT which with 4 discs gives me full cover, but of course not as fast.
Oh well, you live and learn.
Thanks again !!