DT ORDER WENT OFF ON THE INCORRECT DAY

I was contacted in February by a man called Andrew Beyer regarding a policy. I mentioned to his that the 1st instalment CAN only go off on 1 April 2015. This morning I received an sms that R200 was deducted from my bank acc for the mentioned company. The dt order was suppose to go off on 1 APRIL and not on 25 March. This is unacceptable and now I want to cancel my contract with immediate effect with the company. I can give proof that the dt order was suppose to go off 1 April 2015. I want my account to be credited with the R200 with immediate effect (within 24 hours) plus the R30 fee that I must pay for cancelling the debit order. I am not interested any more in this contract due to the company's bad attitude to put through the dt order on the incorrect date. They must not even contact me in future. If more money is deducted from my account I will get legal assistance. I'm working for a lawyer's company.