Hi @vivd, welcome to the forum, and thanks for posting. Sorry that you've been getting this error since you connected 3 weeks ago?
As you've already had 3 engineer visits I'll take it your home setup has been checked and we'll need to look into this further for you. I've sent you a Private Message so you can get in touch with the Mod team and we'll be happy to help you get this fixed.
Cheers
John
