How to desinstall the modules?

[cattty]

Hello,

I see on the site the following errors:

 

6 errori

fbpixel (errore di analisi in /modules/fbpixel/fbpixel.php)

fbpixel (classe mancante in /modules/fbpixel/fbpixel.php)

storeya (errore di analisi in /modules/storeya/storeya.php)

storeya (classe mancante in /modules/storeya/storeya.php)

zopimfree (errore di analisi in /modules/zopimfree/zopimfree.php)

zopimfree (classe mancante in /modules/zopimfree/zopimfree.php)

 

I want to remove the modules from the site (because I think that they cause the other problems so I cannot access). The problem is that I cannot see them in the list of modules. How to remove them?