Hi! Can you send the error and a link to the site?
If the site isn’t hosted with us (and it sounds like it isn’t) we most likely can’t help much. But your host may be able to help you restore a backup, then you can troubleshoot why removing those plugins caused an error. They may also see errors in the logs that could help point to the issue.
Or, you’d be welcome to migrate your site to our services once this is resolved, so we can provide direct support going forward. All of our paid plans include hosting, support, maintenance, SSL, and more. You can find our pricing here: https://wordpress.com/pricing