Integrate 3rd party payment provider into WIX site

The company where I am doing an internship asked me to integrate a local payment provider into the my company’s WIX website. After hours of Google’ing it looks like it hasn’t been done before and I have no clue of what to do and where to start.
Does anyone have any experience with anything like this?
I have been told that it’s quite a job for a one person crew and my internship is unpaid. So I would like to know if someone has an indication of what it will cost for a company to hire someone to do this for them.

Edit: I have to integrate ApcoPay

I don’t know what payment processor you need to integrate, but you should be able to use the provider’s API and the wix-fetch API. You can read about how to access 3rd party services in the article Velo: How to Access 3rd-Party Services with the Fetch API . See the Stripe Payment Processing Example to see an example of integrating a payment processor into a Wix site using Velo.

As another option, you can see if the payment processor’s NPM library is available in the Wix Package Manager .

I have to integrate ApcoPay
I have seen the links you mentioned, but I don’t know where to start and as the only Software Developer in the company I can’t really ask for help here.

If you are interested in hiring a developer, please visit the Wix Marketplace . You should be able to get some quotes there.