ABSA PAID UP LETTER, IMPOSSIBLE TO GET

ABSA Paid Up Letter. I have been contacted by my debt review company and by ABSA to obtain a paid up letter from ABSA via a telephone number that they provided to me. Both companies provided me with the same number, however when I try to phone the number I just get the number does not exist. I also tried logging in to my banking app but could also not find the paid up letter there. As I understand it, there is about 3 paid up letters that I require but it is an impossible task. I have to phone the number and choose option 3 but the phone number that they gave ne are a few digits too short. How does ABSA not know their own tellephone numbers?