DONT USE TECH 5 NO SUPPORT

The most shocking service ever New fibre installed. Problems firstly was told I should connect everything to cable asked how do I do that with my cell phone? then they said I need boosters but everything is in one room. My Tv buffered on Netflix on device on have 20up and 20 dn and was told the Tv used the whole bandwith but the way I was told I could not understand support wrote a condescending letter basically pointing out that I failed to comprehend anything he said. I had Adsl before 10 up 4 down and never had any problems they have not told me I can only speak to one of the other support guys but he is not always in. WHat kind of service is this