Account and internet problems

hi , this is my first post and might be in the wrong place , however after attempting to join the community for over a week and getting nowhere , i unfortunately  don't care .  i signed up to have fibre broadband on 14 December , the salesman got my email wrong on my details so i wasn't  been able to contact anyone , i wasn't able to create an account as my email address wasn't recognised and i never recieved a welcome message because obviously no one had my email address ,i've spent days attempting to find a person to speak to about this problem and all i get is a stupid automated assistant that doesn't seem able to understand my problem or offer a solution . In desperation i called the sales team and got to speak to a real live human being who managed to change my email details to enable me to create an account , but that lasted a day before i couldn't sign in as my details were not recognised again , this is a circle i've been going through for weeks now , it's funny that i can recieve a text message to say the engineers will be attending to install my new fibre line , and then a message to say the installation team will be coming to install my router , which they actually completed yesterday . I now have a router that my laptop doesn't recognise , an account that i can't get into , an email address that isn't recognised and no answers to help me solve anything . this is my one and only attempt to get this fixed today , if i recieve no satisfactory answers i will be calling the sales team again and arranging for an engineer to remove the equipment , at this point in time i am rating my experience at zero , how a company can operate like this is totally beyond my understanding , so if anyone can offer me some assistance please reply , fortunately in some ways i still have my internet access with my old supplier or i wouldn't be here now . and yes, i'm a little bit annoyed .

 

 

[MOD EDIT: Subject title changed for clarity]