I would advice against calling, said phone number, if googled, has a LOT of results for it being used/been used by fake scam companies claiming to be google, microsoft, norton, apple, Icloud and almost anything else.
so.. no, I wouldn't call them. If website suggests said phone number, I would claim malware and scan the computer for them.
If you are lucky, they wont charge you 10 dollars/minute for idle talk and only try to ask you for your passwords/login details/credit card numbers. (It's a SCAM, don't call, don't answer)
If you are unlucky they might do both, charge you for the call and try to ask for passwords/CC numbers/such