PHP Developer required to edit some code.

General information for the website: real estate website
Num. of web pages/modules: 1
Description of requirements/features: Hi
I have a website which is working fine. It pulls in information regarding properties from an XML file and adds them to the website DB to then display them on the website.

There are three source XML files which are sent from the clients real estate software, each with specific data regarding properties. This is then converted into a single XML using a PHP file and this runs on a CRON job every 2 mins.

For some reason the output XML file is not displaying all of the properties and I need a PHP developer to quickly find the problem and resolve it.

I'd ideally like to work with someone long term that can provide support on this set up.

The original developer is unable to assist so I need to find a new developer.

This shouldn't be a long job but there will be ongoing work with me.
Extra notes: I don't want to go through all of the details on this public form but happy to email the specific files and links to people.