Hi there! My name is Adam.
I've seen your project before and you've chosen someone for about $20 for X-Cart upgrading from
4.3.2... You need to know that, unfortunately, there is no simple upgrade pack for 4.3.2, there is only database upgrade script etc. OK, doesn't matter now.
Here is my offer: there are few possible solutions depending on the reason, your shop doesn't work.
Maybe we could try to use the older version of PHP, maybe there is just small incompatibility (full compatible with PHP7 is X-Cart 4.7+) and we could fix it, maybe upgrading to 4.7 will be necessary - it's hard to say now.
I'll try to help you. I'm not experienced with x-cart but I'm full-time server admin (and I fix all kind of errors on daily basis), I have experience with other e-commerce systems. I've also read x-cart documentation about upgrading process, software requirements and compatibilities.
I'd like to check it. If there is any solution other than upgrading, I'll find it and solve this issue.
If not, we will talk about upgrading to 4.7, but I need to check your theme, customisations etc first.
Just let me know if you are interested.
Best regards,
Adam