Stop sending me email ads

Netgear won't stop sending me email ads. I've tried unsubscribing at least 3 times over the last 2 months and I keep getting the emails. There's no option in my Netgear account to turn off marketing emails, just through email link itself, which doesn't work. This is the last time I will ever purchase a Netgear product. Can't someone please tell me how to stop these annoying emails. Thank you.