Webafrica Vouchers bought in advance has no value

I recently and in the past few months bought vouchers in advance because I always like my account to be in credit......like buying prepaid electric. I contacted webafrica because after the 28 day voucher expires they disconnect my line, even though I have vouchers credits. I must have bought 5 vouchers in order to have credit vouchers available on my account but they somehow can't find my vouchers???? I purchase the vouchers using the EasyPay Mobile app. I'm being told by Webafrica Whatsapp Chat that,

This is the actual message from Webafrica Whatsapp, *Miles*: we are currently trying to locate those double payments, yes it will reflect however the services are month to month and and your service is every 28 days. The system on our end only requires one payment per month or every 28 days for vuma reach double payments won't get allocated according for your service as 28 day voucher is prepaid.(end of Whatsapp me)

What happened to all my vouchers I purchased in advance and why can't I buy Vouchers in advance???? This is ****************.....

I purchase my vouchers using a reference number (***) which will automatically be linked to my webafrica profile.

I've tried to understand the statements I request when this happens but my credit vouchers never reflects on the statements although my bank account shows the payments has gone through. I requested a statement from EasyPay and will be receiving it on Monday 25 April 2022 after which I will contact the ombudsman and furnish all transcripts as well.

I DO NOT UNDERSTAND WHY I CAN'T BUY VOUCHERS IN ADVANCE......YOUR ACCOUNT STATEMENTS I RECEIVE IS PATHETIC TO SAY THE LEAST. I've been in touch with Webafrica on 22 April 2022 and they still can't find my vouchers that's supposed to be shown as credit. Webafrica, please sort out my vouchers, My reference number on your Webafrica Whatsapp is ( *** ) FROM A VERY DISAPPOINTED CLIENT.