Thank you for the list of exchanges.
I want to buy TON with my credit card, so I'm searching for the solution with less commission.
I highly suggest Binance if you want to involved credit card as means on buying TON coins. You can purchase first USDT using the exchange fiat otc feature then purchase ton coin via spot trading.
Just withdraw your funds outside Binance to TON non custodial wallet such as Tonkeeper to hold your coins safely. Use the most trusted CEX if you will your credit card to have less risk of encountering problem.