Hank here from Shopify.
The payment gateway you can use depends on what country your store is located in. I do not believe MB way is a part of the payment integration, but I will share this guide with you, and you will be able to see what payment gateway options you have in your country.
That said, you may be able to set this up as an alternative payment method. This is for stores looking to use the likes of cash on delivery, or bank transfers, etc, as a payment method rather than the standard credit or debit card option.
Let me know how you get on with this, or if you have any further questions for me!
All the best,