Bad service

I'm so disappointed by the bad customer service offered by KFC, I have logged a query on the 18th of October using the Facebook platform regarding the fact that KFC Tsakane mall's voucher till hasn't been working for over 2 months now. I depend on vouchers to feed my kids as I'm unemployed and it really pains me to see my kids going hungry whereas I've got a voucher. The KFC team called me and advised me to download the KFC app in order to order and pay online with the voucher however KFC Tsakane mall is not showing on the list of stores and it's also not appearing on the website. Called the customer service department and told them their suggestion didn't work, was promised that they will look into it. 3 weeks down the line still there was no resolution and nobody bothered to contact me back as promised. Went to the store again last week Friday still the voucher till was not working, went back on the app and website but still the store was still not appearing. Complained again to on the Facebook platform and was advised that my query would be attended to within 24-72 hours, 144 hours later still no response, went back on Facebook and all I got was a "apologies for the delay our team will revert back to you" KFC must decide if they're gonna give me a resolution and compensate me for my time wasted by traveling to Tsakane mall every week only to find the same nonsense, my data and airtime used to communicate with them, I'm unemployed that R20 I use to travel to and from KFC twice a week only to havey kids disappointed is uncalled for. I have never experienced such bad service in my entire life.