Clientele Makes an error and don't fulfill on claim

Clientele don't want to assist with my claim I have been paying them time and time month to month regularly without any issues besides the time I got retrenched which was 2 years ago but even beforehand my account with them had been up to date I have 3 different covers with them and all are always paid successfully and on time, 2 months ago they made an error and seem to have attempted to to debit my account early for my legal policy with one I did not authorize and at that point in time the attempted to debit on the 23rd February 2018 whom in their right mind does that unless I work for the government and get paid on the 15 and 16 of the month I would have no problem, now I have a very urgent claim that I have submitted and they keep telling me I did not pay and I sent my personal bank statements to prove to them that their system has a problem because on my end it shows all my debit orders had gone through and worst of all the legal policy is the lowest of all 3 how could they possibly debit the highest amounts and say the least amount was returned I have called and sent numerous emails to clientele instead I keep getting shoved from pillar to post being told I did not pay and the lawyers themselves are full of attitude telling me they don't deal with debit order quieries I'm not happy and the fact that I have been loyal and to be treated like this is really not good customer service.