Unsubscribing to most of these emails is not a recommended step in all security/spam mail removal blogs and advice. Most unsubscribes in these cases only confirm for spammers that they have a “live victim”. You may get lucky with the odd one that may remove you from their addresses but it is very rare and not worth the risk. It is better to just filter the emails straight to the deleted/bin/junk folder.
Unsubscribing is worth trying only when it has been with a reputable company to whom you have subscribed for contact. I doubt that in the case of Miranda that @Tanya even initially subscribed to the mailing list, the address was likely added as a result of someone buying the address off a spammer or through a purchase of addresses off another mailing list from a company that sells it’s data.