MFC debiting without permission

Not sure what to do about MFC the help i have been receiving during this last two weeks was very disappointing. I moved my debit order date a month before April to the 1st of every month. On the 1st of April i receive a letter saying im in arrears. So in order to keep loyal to MFC i paid the installment. Later that night the debit order went off. Then i called for a refund and struggled for two weeks to get refunded while a guy calls me telling me they need proof of payment. Honestly this shows on their records. Then finally yesterday the refund was made. Beginning of March i asked for the installment to be split up in three months. Today i woke up to a big amount debited from my account for the installment i asked to be split in to 3 months. Then i call this morning asking for help where NICHOLAS told me i should phone back on Tuesday where by i explained that i cant wait until Tuesday because i will struggle for another two weeks to get my money back. Honestly MFC is not helping the consumer here. And this is a crisis time where by help is needed. Can someone please advise what i should do as the only thing suggested to me was an Ombudsman.