Super bad service

Payment made on 17/03/2022 is still not reflecting… I sent proof of payment to *** on the 05/04/2022 and again on the 10/04/2022 and on the 11/04/2022 this payment but it shows that it is outstanding… How does Cell C work when the other payment are reflecting and this one is still outstanding. I am highly disappointed for the service I have been receiving and the Call Centre does not even provide me with a ref number for the calls I have made as I have made numerous and it is draining. This is my 2nd reveiew I am so disappointed as this is affecting my credit record.