Harassed by unsolicited SMS's from Game Stores

Despite numerous calls to Game I am still bombarded with SMS's every week. I did not give them permission to send me any marketing info. Constantly harassed by pensioner's day and over 6o yrs discounts when I am not even 60. It's a contravention of the POPIA Act. I will not use this retail company. No respect for privacy. SMS get sent before 6am every week also unacceptable and multiple phone accounts are used so can't even block their calls. Shocking company and service levels. Where did they get my number in the first place? Obviously bought it! So *********. I have reported so many times and yet this continues.