You are speaking from the point of view of a scalper, which I am not. I have mentioned my doubts about those (and there is a Scalping Footsie thread , on this site) who say that they are scalpers when the reality is that they are short term traders. OP, judging by the number of trades that he made, is a scalper.
I, as a client of Finspreads, do not understand how he did it. The trading platform is far too slow to support that activity. Frankly, a scalper would know, in a very short time, that he was not in the right place for what he wanted to do.
If Finspreads are not geared up to deal with "scalping" traders, why shoukl they deal with them?
What I do not agree with is their lack of clarity in not stating their reasons for closing an account.
If, in their email to OP, they had given the reason for the cancellation of the account then he would not have had a reason for posting the letter here and, perhaps, this thread would not exist.