Fibre

So I had someone come round on Wednesday and change my router, left saying it's working fine and it was, today it not working at all-
So I check out fibre, says we can get the connection fee worth £50 for free! So ordered it.. Turns out I been charged £25 for it ?
Can't log in online now as they have now cut off my line because uve place a new order !!!
Joke !!! Nothing just trouble