Unfortunately, we do not provide upgrade services. While we can direct you in how to upgrade, we are unable to do this on your behalf.
To explain. Upgrading is a case of selecting the upgrade button within your admin CP, however as you are on a version prior to 4.7, it would likely involve ensuring you are on PHP 8, and ensuring that any 3rd party items you have are compatible. Those are items you would need your hosting company for, and would need to update 3rd party items for. Even if we were to do the upgrade, those items would still need to occur
If you are having issues on your hosting side of things on running your site, you may actually be better off on our cloud solution.