In April 2021 I made a payment

In April 2021 I made a payment. After long time calling and emailing the prove of payment. The money is not updated. 2. I made instore payment in May. Then I recieve emails and calls that the amount is outstanding. I emailed prove of payment. Then they responded by email that the matter is resolved. Then every week including today I recieve emails and sms that I owe them.