We’re sorry to hear you are receiving unwanted mail and understand how frustrating this can be.
Although the mail you received may have a return address for MAMS this is simply an address for undeliverable mail to return to, if for any reason the Royal Mail are unable to deliver it.
If you no longer wish to receive a specific mailing then you will need to contact the company identified inside the mail pack.
We produce and mail the packs on behalf of different clients. As such in this case we are a ‘Data Processor’ for GDPR purposes not a ‘Data Controller’ and we are unable to alter the lists supplied to us by our customers – for an explanation of this see the ICO page linked below.
ICO – What are controllers and processors
If you wish to reduce the amount of unsolicited mail you receive then it may be worth registering with the Mailing Preference Service on the link below.