Worst experience ever

I was renewing my disc license via the Momo app and the transaction was successful and I also got the sms that they are processing the transaction and disc will be shipped to me in 7-14 business days, after several weeks waiting I check again on the app and it says I need to contact carlisence, click on the link on the app but couldn't get anything so I called the carlisence and I was told that they did not recieve any payment of the payment was made I must email them a proof of payment mind you this was do e in Feb and now we are in may eventually I used RMTC app to pay the disc and I've recieved in 3days

I got this reference from MTN Req406312.

I've been emailing Momo department no response nor acknowledging my email, DM'd mtn on Twitter and they always saying will escalate. All I want is my money back because they've failed to assist me.