Need help designing Wix mobile site

This is a small job. I am not a web designer or developer. I have built a simple website on Wix to raise money for essential repairs to our church. The desktop site is fine with a couple of small issues. I need someone to finish off the mobile version. I don't want to start again so am not open to someone suggesting another site developer. I can let you have URLs and login details once we agree to work together.

Budget to be agreed.