Your expectations of what a flying school would do for you might be reasonable - if you were not talking about a flying school, pro-active, organised, business like? That would be quite an exceptional flying school. Unfortunately they are rarer than hen's teeth.
Can you change schools? Yes easily.
Do you really only need 6-8 hours training? Well your new school might agree but wwith that level of experience and a prolonged break I suspect they will spend a lot of time revised things you have forgotten - or possibly never knew.
You would like to complete your training within a week? Great ambition, might be possible - but see above. Depending on what you may or may not have forgotten it could be a long long week. Re-taking the exams is frankly no big deal - especially if you genuinely are that close to a ppl standard.
Your post seems to be setting a variety of criteria which simply complicate matters. Unless you have to have a ppl to gain a legacy or something the time is what the time is - try and enjoy the experience rather than just get it over and done with.