I need help to get my Magento 2 site back online after a series of errors

Please only bid if you are able to do this straight away as I am on a time deadline and I need to get my site back up ASAP. The issue started after I clicked the 'Flush Static Cache' button in admin, but after doing so, my site lost all it's formatting. I have tried a number of things which I read should fix it, but they didn't: php bin/magento setup:upgrade php bin/magento setup:di:compile php bin/magento setup:static-content:deploy php bin/magento indexer:reindex php bin/magento cache:flush The formatting is still lost on the front end and if I try to get to the cache page in Admin, I get the following error: 1 exception(s): Exception #0 (ReflectionException): Class Magento\User\Model\User\Interceptor does not exist Exception #0 (ReflectionException): Class Magento\User\Model\User\Interceptor does not exist <pre>#1 Magento\Framework\Code\Reader\ClassReader->getConstructor('Magento\User\Mod...') called at [vendor/magento/framework/ObjectManager/Definition/[login to view URL]] #2 Magento\Framework\ObjectManager\Definition\Runtime->getParameters('Magento\User\Mod...') called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/[login to view URL]] #3 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create('Magento\User\Mod...') called at [vendor/magento/framework/ObjectManager/[login to view URL]] #4 Magento\Framework\ObjectManager\ObjectManager->get('Magento\User\Mod...') called at [vendor/magento/framework/ObjectManager/Factory/[login to view URL]] #5 Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgument(array('instance' => 'Magento\Backend\...'), 'Magento\Backend\...', NULL, 'credentialStorag...', 'Magento\Backend\...') called at [vendor/magento/framework/ObjectManager/Factory/[login to view URL]] #6 Magento\Framework\ObjectManager\Factory\AbstractFactory->getResolvedArgument('Magento\Backend\...', array('credentialStorag...', 'Magento\Backend\...', true, NULL, false), array()) called at [vendor/magento/framework/ObjectManager/Factory/[login to view URL]] #7 Magento\Framework\ObjectManager\Factory\AbstractFactory-... Whilst trying to fix the above issues, I ran the command: find . -type d -exec chmod 770 {} \; && find . -type f -exec chmod 660 {} \; && chmod u+x bin/magento And now I have forbidden access to the site.