Avoid them, they'll just spam you

I followed their unsubscribe link multiple times, but they never stopped spamming me. The last time I tried to unsubscribe, it just made them spam me almost daily instead of every few weeks.

I emailed their customer support to ask them to stop, no response.

I phoned their customer support, I was put on hold for almost 7 minutes, and was told I have been unsubscribed.

But no, they still spam me.