Please Stop Spamming me!

Made the big mistake to fill a repeat prescription at Clicks on 1 January. <br> Now receiving constant spam messages from Clicks as below (more than 60 messages in 10 minutes).<br> \You have chosen Clicks as your preferred pharmacy when you need to collect medicine. This will start on 2016-01-01"<br> Are you kidding me?<br> You are NOT my preferred pharmacy - especially not after you spammed me!<br> Fix your system and stop sending these **** messages to everyone!<br> I had to switch off my phone"