while you are shopping the price is fluctuating a lot, imagine it goes up or down every second, it is not something acceptable. I am from Peru and I buy p2p USDT and with that other cryptos

good evening community I am new to this I have invested 100 soles in HBAR. But I wanted to buy other cryptocurrencies with my visa card (XRP or CARDANO) I entered my bank card and it does not allow me it shows me these red letters saying the following:
PLEASE help me.