Absa double standards and confusing

I am currently with absa vehicle finance and have been for 3years.i Am in the process of selling my vehicle and buying another. All of a sudden my new loan is declined and the reason being that a payment was missed in 2018 somewhere. I recall that absa did phone me about 6 or 7 times and said that i was in arrears. I asked them to send me a statement on every occasion so i can see where the problem lies. They prommised me that they will send it but since the beginning of my contract i have only received one statement in the whole of 3 years. That was 16August 2017.Absa gave me the excuse that they had the wrong e-mail address.I find it very strange as my e-mail address has never change. Now all of a sudden i have a bad credit record and i was told that if i pay the arrears my record will be cleared. I did immediate payment as i dont want to lose the car i app**** for. GREAT payment was done and now all of a sudden absa responded by saying i must wait for 6 months before i can apply again. Doubke standards and very confusing. I dont think i will ever be going with absa again. Never was i ever informed that they will hand me over to the credit bereau. I was very wrong to skip payment but i was hoping by now 3 years later to have had at least more than one statement to track my payments. Absa never again