SPAM MESSAGES AFTER AIRTIME RECHARGE

Please MTN remove these hordes of spam promotional sms messages that are delivered to my phone everytime i recharge. All i want is a message, one(1) message that confirms I have recharged a certain amount.<br> <br> I called on 24th August and 25 August 2015 and was told its being resolved. Up until today 28 August 2015 am still receiving messages. It doesnt make sense that the customer, customer service 1st line, supervisor and whatever the marketing people are not able to remove these 4days down the line.<br> <br> i have been using my line for past 7years and given it being my primary line i cant imagine, even it being prepaid, to have to delete 6sms everytime i recharge. if i recharge 4times a day i have 24useless sms in my mailbox.<br> <br> Please stop this before i throw this line in the bin.<br> <br> Regards,<br> <br> Tad