Poor customer service

I've made my monthly payment using the cellc app since my salary came in late end of March 2023,2 weeks later my phone disconnected and I call they say I didn't pay and I explain that I did pay via my cell c app and the said I must send proof of payment which I did immediately and followed up 2 days later and I'm told they never received it then I was given a different email address to use and still 2 days later I'm told they haven't received then they go and debit account and I call them to say since I made payment and you also debited my account which come monthend no debit order should go off my account they said fine they will update both payments. Today it's the 17 of May and still after more that 5 email and calls that I have made no one has come back to me and the payment I made end of March is still has not reflecting on my cell c statement and they are no longer returning my emails. Very very disappointed