Escape clause in the RWTH International Academy's student contract?

Hello, I'm a prospective student who has received an admit from the IntAc for an MSc course. They've mailed me requesting that I sign a contract by 15th May and pay semester fees by 5th June. I'm still waiting to hear back from other unis before I make a decision on where I end up based on many factors (curriculum, cost of living, job opportunities, etc) If I sign the contract and pay the fees by the requested dates, is there a way I can get out of the contract and get my fees refunded if I should decide to do so? Does anybody have any experience with this sort of thing?