Horrible service!!

I always pay my @home account each month by around the 7th, I never miss a month of payment. According to the call centre they cannot change my payment date that is for the 1st of each month. I do not get paid on the 1st so this means I am paying more each month than I am suppose to they are making more out of me and when I phone the call centre they do not even give me a change to speak he keeps on talking over me. I do not have this problem with other companies. I need to change the date that I only get paid after the 7th of each month and not the 1st this is pathetic