any idea how to unsubscribe from their mail list? this week I got at least three spasms from this shady company, yet I font remember providing them with my emai

any idea how to unsubscribe from their mail list? this week I got at least three spasms from this shady company, yet I font remember providing them with my email address and they are missing unsubscribe link in e-mail, so my whole impression of this company summed to two keywords - shady spammers