Useless service

I signed a contract in February, upon signing I had requested my debit date to be the 25th , they ignored my request and made it the 15th of the month , I had them called and asked for it be changed AGAIN , after not paying attention to it , I had discovered that I had not been debited for 2 months , because my debit order was still NOT changed!

I then called customer service who then told me to contact the branch , I was put through to the branch sales consultant to sort a payment method out , she told me she would call me back and still did not , I called and followed up the next day and she said the manager would contact me on the same day , it has been a day and still nothing , this service is poor and they are completely useless when trying to resolve issues