communication failure, no help and rude agents

Good day I am highly disappointed in travelstart where flights that could have cost me 5 to 6 thousand are now costing me 9000 but they don't reply to any emails and when you call you are waiting for an hour or two without response at times. On the 9th March 2022 we book for a flight ticket through travelstart which the bank card declined but we only received a response email on the 10th of March 2022 stating that the card has declined, which suggest that we re- forward the money through a EFT- payment and not to make another booking as it would duplicate the booking. The payment was done on the 10 march 2022 and proof of payment was sent along with the payment .Two days later I kept calling and sending emails to ask why there wasn't confirmation of the booking but with no response two weeks later on the 20th I sent an email again with no response and I was panicking as I was getting closure to the travelling dates. even utilized the whatsapp platform and the contact page on the website and still nothing.On the 22 march 2022 i called and waited for an hour without an answer and i have to depart on the 23rd March,i dialed again only to be told that my flight was canceled due to non payment,it was not communicated, as i could made another booking because planes were cheaper at the time of my booking. I did pay and have also sent proof payment,Upon discovery all they did was offer a refund which will also take 4-6weeks so I optioned to pay more just to utilize the funds they have which was not practical and cost effective.Plus agent are very rude