Unacceptable service

I have a very small bond with ABSA paid via debit order. Since June 2018 they listed me on ITC as late payment which has now influenced my credit rating. My payments is made on time via debit order. e.g. February has 28 days so the debit order reflects the 1/03/.... They then record this as non payment or late payment. Three months in 2019 they debit my account twice in one month and still record this as late payment I provided them with all the payments history and they seem to not care at all.