hi @halostore ,
We can assist you to integrate third-party payment gateway to your Shopify store.
Share your contact details or send me a DM for more details.
Nick here from Shopify.
Just to confirm, it is only possible to have one active payment gateway and then PayPal active on your store. Can you elaborate on what you mean a little when you say:
Hi, I want to add another payment method. Both Third-Party providers and alternative payments are unavailable to my country (Israel).
You can see all the available payment gateways which you can use in Israel here. There are many more than two payment gateways available in Israel also.
I look forward to hearing from you regarding the above.