False advertising

On 7 sept i booked my flight to jhb for 3 oct. I will be going on holiday there for the week. I received my confirmation email which stated in bold letters i can use my edgars account to pay for my next flight... Trying to book flights back using my edgars account... There were no option for edgars card payments... I called mango and they said since lockdown edgars account can no longer be used... Having to cut on my spending money and probably have to go make a loan as this extra 1720 i did not budget for as i thought i will use my edgars account... Today, 11 sept i booked flights back for 10 october... Had to ask to use someones credit card which i needed to pay upfront... Only get another confirmation email comfirming my flight booking... Stating in bold i can use edgars account... Again i called cause then i wanted the money back and rebook with edgars account... The rude agent sello just sai di cant use edgars. I asked why not as u advertise it very boldly and that is what i want to do... Without even telling me after being very ruse he put me on hold for over 15 mins and i eventually dropped the line as u clearly aint paying my bill... This is really not in line with treating customers fairly... My holiday didnt even start and yet i feel this experience has turned into sour g****s... I want to exercise the option to pay with my edgars account my flights back as this is what your confirmation siad i could do... This is false advertising and i aint going to leave it by just receiving an apology... This is unacceptable