Marketing messages in the AM

I have had enough of your SMS's being delivered at the early hours of the morning. Like seriously we are trying to rest, but no, 1:03am you get a sms from MTN or like this morning 02:48am....this is not the first time, but it will be the last. Fix your systems, or I will move away from MTN after 22 years.

Yes I am not subscribed to any *135# Concent Management. Everything is set to NO. I have screenshots to prove this. Also, this paticular SMS has to do with MOMO. I wanted to delete my profile, but how can I if the APP does not work?