No opt out option on their phone marketing

Hi, I have received a total of 5 marketing messages for today only between 16h00 and 17h00 from Stone Cradle. The message reads: \or [Email Removed] or visit our website [URL Removed] You can also register on our website to receive our monthly Stonecradle Newsletter."<br> <br> I tried to reply with \""Stop\"" but then I immediately got another message from them. I sent them an email to bookings@stonecradle requesting that they remove my cellphone number from their database and then shortly afterwards I got the 5th marketing message from them.<br> <br> I tried to phone them on their *** number but it just rang.<br> <br> Can they please remove my cellphone number from their database?"""