Smegoweb — scammers
They tell you that your website is not working properly. They then direct you to some websites that 'test' your website - predictably they throw up lots of coding errors.
However this online software is designed to give false errors. In fact the websites of Smegoweb, Facebook and even Google throw up lots of errors. Some of these 'errors' are actually positives designed to speed up a website.
They will send you an email with lots of information on how they will 'fix' your site.
Do not entertain these crooks.