Also since i last flew with them i have had no contact from anyone except a letter advising me that my membership had expired and costs of renewal. I would have thought that they would have been proactive in getting me back into training, and advising me of my deadline.
I work at a small airfield and this subject (in general, not yours personally!) came up a couple of days ago. We get quite a few students who start their course, many get to solo stage, then for one reason or another they don't come back. You claim not to have been impressed by your flying school, yet you have done 45 hours with them and all your ground school and exams. You must have been impressed by them or you would not have spent all that money. It would appear however that you may be cheesed off by them not enquiring why you have not continued with the your lessons. In some ways you have a right to be so, but why did you not let the school/instructor know that for personal reasons you were unable to continue your lessons? Communication is a two way street.
You are a student with quite a few hours under your belt. I would suggest you start communicating with your old school whilst investigating costs etc with the other local school. Ask the current school about taking your file - it should not be a problem. But at the very least speak to somebody. I am sure you will get a hundred different answers here on PPrune but only you have the full picture and it is your decision.