you can change the fiat on-ramp link in the admin panel. (looking for another provider, not itez.swaponline.io? check it out https://fancycrave.com/bitcoin-affiliate-programs/ )
You can choose another fiat gateway: moonpay, indacoin, simplex, coinfity, localbitcoin.com, or another. Just go there, sign up as an affiliate, get an affiliate link, and paste in the admin panel. This link will be on the “deposit” screen.
2. also you can add this link to the “banner” page: