Not able to delete my nr from a sms list

I have not work at KFC for more than 3 years now. I still receive sms's from their distributor when certain stock items are short or out of stock. I have tried for 3years to get mynr taken off and in the last month even contacted the careline, after attempts with the KFC franchise and Digistics the distributor but still i received 4 sms's in the last hour of stock problems. I really do not want to know or care.