A couple of things spring to mind.
As far as I remember, on an integrated course, you don't have to do the MECR - you can just(!) do the 170a then IR(M/E) and open your CPL on the S/E aeroplane with your Multi/IR attached. If you don't intend flying a light twin after your course there is little point in having the MECR anyway.
Another option, if things have gone sour at your FTO, is to transfer to a decent school such as Bristol Flying Centre, get a dedicated excellent flying instructor such as Nasib and fly every day. You wil be sorted very quickly and never look back!
If you do go to BFC or a similar (non-integrated) school you will have to inform the CAA and it may be worth your while getting your CPL (opened on your S/E A/C) immediately. From this point on you will have to satisfy the modular hours criteria.
Needless to say, getting your current FTO to pull their finger out and do what you're paying them to do is preferable, but which ever path you take do it quickly as currency is king (although looking at your reply above continuity is THE problem)