Lack of service from Telkom

I bought airtime last Wednesday for my dad's landline. Bought a R200 landline voucher from my ABSA app. Punched voucher code in and got error message. Contacted Telkom on 10210 immediately and they also tried but same error coz apparently landline vouchers no longer work but can be bought still, obviously. Took my cell number to have voucher department call me back. Called on Saturday after no response, was told voucher dept not there and to try again in working hours. Tried today and an hour lata they wanted me to give them my bank statement to confirm funds for voucher came from my account? even after I mailed them the notification sms with voucher number and reference. I demanded to speak to supervisor and was cut off when transferred... so still not resolved!!!! Its been more than a week already!!