Cancellation of Account

We purchased 3 contracts at You & Mobile. It was never brought under our attention that we have to use 50MB a month or the contract will be cancelled. After the initial 30 days we were contacted by them and informed that our contracts will be cancelled. We offered to pay for the 50MB although we did not use same. They refused and said the contract will be cancelled end of January 2016. The sim cards of the 3 phones were removed and locked in storage in view thereof that it is cancelled. Beginning of February 2016 a payment was deducted against our bank account. Upon enquiry they informed us that our deposit will be returned during February 2016. A sms was received yesterday that a further amount on all 3 contracts will be deducted on 29 February 2016. If you contact Me & You Mobile via email, whatsapp or phone you can't get a hold of them. After 3 failed attempts yesterday and holding 45 minutes we manage to speak to Customer Service. We were once again informed the billing is correct and in March 2016 our deposit will be returned. We informed her that the phones were not in use. She was not able to assist us further and could not direct us to her supervisor.