Stripe, Shopify Payments, sent me an email to let me know that they can’t provide any more support to my business.What alternatives can I use.

Ask your bank if they have a merchant account service. Oftentimes they can provide a direct merchant account service. Also, you can try with this service instead of Stripe, they are more open for dropship business model, and more chances to be approved – https://www.easypaydirect.com/ . Another option is by using PaymentCloud, which implements directly onto Shopify through Authorize.net.