Wrong debit order date

I just about had it with this company out agreement is for the debit order to go of on the 1 off every month But they try every month on the 25 when there no money then come the middle of the month i get a call saying am behind and need to pay our will get black list for something clearly not my mistake keep sending emails no response but quickly can call and go in about thee own mistakes am done if they don't debit on the 1 st not my problem listen to you recording there is a agreement in place