Its a struggle to close a Standard Bank credit card, Worst service ever

On 04/11/2020 I Called the standard bank division requesting to close my credit card and I was told that I must pay the settlement fee of R50 (which was paid) then call again in 24hours, then I called them again today on the 05/11/2020 and I'm told that i need to pay another settlement fee of R318, then i asked the consultant why should i pay this amount even though a day before i had to pay R50, he tells me he wasn't involved in the previous call and unfortunately they wont be able to close my credit card unless i pay the outstanding amount. Its easy to open the account but a battle to close it, worst service ever.