TravelStart uses false advertising to try and **** more money out of you/

Be very careful in booking anything with Travelstart, they used to be a good company, but recently they have started trying to **** travelers with additional and hidden charges. I booked a flight with them, and selected and pre-paid for the seat selection during the booking process. After having to unselect about 5 different upsell options, I finally made it to checkout and paid for my flights. 2 Days before my flight, I get a call from them saying that I owe money for the seat selection and that it has to be paid in an hour or I will lose my seats. I asked about the money I already paid for seat selection, and I was told that it was for the seat service charge (whatever the hell that is supposed to be). I was in the middle of a meeting so I asked them to send me the invoice for the required amount and payment instructions so that I can pay them. I get an invoice showing that I owe them nothing. I tried phoning to find out what is happening, and the IVR tells me the average wait time is 99 hours . I try to whatsapp them, the bot in the WA takes all my information and then tells me to phone the call center or use the contact info form on the website (why do you even have a chat bot). I fill in all my details again on the contact details form. By this time I have spent more than an hour trying to sort out the absolute chaos of this booking, so I decide to phone the airline, who tells me that I don't owe anything to them (even though the agent told me that it's the airline that is requesting the money), so I calm down and continue with my day. The next day I get another call from Travelstart asking why I did not pay the previous day, and I explain the whole story again. I then receive a new quote showing I owe them R500 for the seats, I click on the link to pay, and the website shows a cost of around R5000 (all the upsells are back, interesting strategy). I once again unclick every upsell, and get back to the R500 , when I try and pay, suddenly the price jumps back up to R800 because there is now a new processing fee that you have to pay after already paying processing and service fees when booking the ticket. PLEASE STAY AWAY FROM THIS COMPANY