How to cancel the SMS of 1237 1? It's so annoying

Haha, the landlord hates 1237 1 as much as I do. It's really annoying. I tried everything. Now, 4s has installed an incoming call firewall, and ordinary short messages sent by 1237 1 can be intercepted, but there is still no way for MMS. 1237 1 is really the largest SMS platform. There is no way, the landlord is calm, let's change the number.