MOMENTUM MULTIPLY AT ITS WORST

Has anyone else experienced terrible service with Momentum Multiply? When I first signed up a few months ago I realized that they were deducting more money than they should for my gym membership. I notified them of the mistake and they never responded or refunded me. This happened two months in a row. I opened my SMS on NEW YEAR'S DAY (2016) to discover that they took an extra R219 out of my bank account without any explanation or reason as to wot its for. I have had it up to HERE with Momentum Multiply. As a full time student and a single mother, they have caused me so much stress over the last few months. As a result I would really like to cancel my contract with Momentum Multiply NOT Momentum Health (they are decent) but worry that they will threaten me to pay what is left of my remaining contract which I simply cannot afford. I would never have taken this leap of faith and spent money that I don't particularly have for this product if I didn't think it would benefit me somehow. However, I would rather hustle and pay my full gym membership than deal with Momentum Multiply any longer. PLEASE do me a favour for once and cancel my contract NO HASSLE!