Taking over a line - Will I get the same problems?

Question

I moved into new premises last Friday. I knew the previous occupant and I had already ordered my new BT line with infinity prior to my chat with him about HIS connection.
He told me he upgraded to Infinity 2 and was quoted 65D and 15U but had never got more than 40D and 10U. He had an engineer out and was told thats the max the line could handle, and until he moved out was stuck with a max profile of 43.3D and 20U.
Anyway I explained this situation to the sales rep when I ordered my new line and broadband and was assured this would NOT be the case in my situation. I was told that athough they could not give me specifics (aparently they are not allowed), but my line was coming out of a different "part" of the cabinet.
I explained to the rep that I understand what he was saying but the previous tennant had been told by openreach that they were getting 80MB at the cabinet and the speed was reducing between the cabinet and the premises, and the new line they are installing was just a "take over" and not a new physucal line so therefore I am worried I might inherit the same issue.
The sales rep told me this would definately not be the case and they get lots of calls like mine and its quite normal to expect things to be the same when you take over the line but this isnt how it works.
So my question, is, does it sound like im being fobbed off or, is there really a chance that suddenly the line might be better if its coming out of a different part of the cabinet even though its the same physical line and the original connection was getting 80MB at the cab end.
I was also promised that if i DIDNT get the expected speeds that BT would install a completely new physical line, which would be nice for customer options to listen into if things go pearshaped. I was also told that If i didnt get the estimates speed then I would only be charged for infinity 40/10??
How much of this is waffle?
CK

Answer 1

Infinity installed...
Same issues!!! Going to cancel and move to Sky's up to 40MB package for half the price. Being given the guff about waiting 10 days though.
CK