Financial harassment

I am sick and tired of the financial torture that I'm receiving from MBD attorneys. I requested them several times to debit my account on my pay day but they decide to debit at anytime of the month. They debited my account twice in March and still waiting for refund form that they promised to mail.I declined their debicheck because they didn't change the debit date, to my surprise the debit still went through even though I declined it. MBD kindly stop harassing me financially and do the right thing.