Breach of contract agreement

You guys have to be the most horrible service providers. My agreement with you guys is the 15th of each month but because I do manual payments everytime between the 10th and 11th my Fibre is blocked. That's a breach of contract honestly this his very hideous. If I say the 15th it means 15th not before nor after on the actually day. This has to be the last month with you guys because no one can clearly fix this matrer