Very very bad customer service

On the 24th December last year my husband went to ackermans wonderboom junctions to purchase some pair of jeans for our daughters and when my daughter tried to fit it, it was too small so the following day morning I realized that we lost the receipt so I went to ackermans wonderpark to try and change it for a bigger size I was told they can't without proof of purchase they advised me to go back to wonderboom branch they can retrieve the transaction and get proof of purchase for me so my husband went back to wonderboom and he was told they can't help him they needed to check the transaction and he left the Jean with them because he was in the store for a long time waiting for them to assist him ,we then emailed their customer care which responded after a week with a promise that the regional manager will contact us and until today we haven't received anything from the regional manager nor the store manager of ackermans wonderboom and the store still has that jean which means we paid for something that we don't have.