Update buy support

Author: tuxpizza

docs/service-support/buy.md

@@ -38,60 +38,6 @@ Cake Wallet currently supports Onramper, Robinhood Connect, and DFX for purchasi
 
 ## Onramper
 
-We use an [Onramper](https://onramper.com) widget to display these crypto providers. If you have an issue with the widget itself, please contact Cake Wallet support. Please use the links below if you need support for the respective provider.
+We use an [Onramper](https://onramper.com) widget to display these crypto providers. If you have an issue with the widget itself, please contact Cake Wallet support. 
 
-## Payfura
-
-[Email](mailto:[email protected]){: .btn .btn-blue .mr-4 }
-
-## Xanpool
-
-[Support website](https://xanpool.com/en/help/){: .btn .btn-blue }
-[Submit request](https://xanpool.com/en/help/contact-us){: .btn .btn-blue }
-
-## Mercuryo
-
-[Email](mailto:[email protected]){: .btn .btn-blue }
-
-## Coinify
-
-[Support website](https://help.coinify.com/){: .btn .btn-blue }
-
-## Indacoin
-
-[Email](mailto:[email protected]){: .btn .btn-blue }
-
-## UTORG
-
-[Email](mailto:[email protected]){: .btn .btn-blue }
-
-## Transak
-
-Proceed to start a live chat via the chat bubble on the payment processor's site.
-
-[Support website](https://support.transak.com/){: .btn .btn-blue } 
-
-## Itez
-
-[Email support](mailto:[email protected]){: .btn .btn-blue }
-[Telegram support](https://t.me/itezsupport){: .btn .btn-blue }
-
-## Topper
-
-[Support website](https://support.topperpay.com){: .btn .btn-blue }
-[Submit request](https://support.topperpay.com/hc/en-us/requests/new){: .btn .btn-blue }
-
-## Paybis
-
-[Support website](https://support.paybis.com/){: .btn .btn-blue }
-[Submit request](https://support.paybis.com/hc/en-us/requests/new){: .btn .btn-blue }
-
-## Guardarian
-
-[Support website](https://guardarian.freshdesk.com/support/home){: .btn .btn-blue }
-[Submit request](https://guardarian.freshdesk.com/support/tickets/new){: .btn .btn-blue }
-
-
-## Banxa
-
-[Submit request](https://support.banxa.com/en/support/tickets/new){: .btn .btn-blue }
+If you need support with your exchange provider, please find the support info for your provider on the [Onramper Knowledge](https://knowledge.onramper.com/how-can-i-get-help) website.