So you too are asserting that the same Mormons who promised have then reneged? And again I can speak for my dead father?
No, I'm asserting what I (plainly, repeatedly) asserted. As for your own dead kin, well, you can speak for 'em, or not. That's your business, I reckon.
Now, if it turns out that you believe that the prayers of random strangers somehow affect the immortal soul of your dead father, and if you ask said strangers to please with sugar on top stop screwing around with your dad's soul, and if said strangers agreed to cease & desist and then turned around and kept on doing it anyway...
...well, I guess I'd say that's rude. Dishonest, maybe. Insensitive, for sure. Un-neighborly, at the very least.
But then again maybe you're right. Doesn't bother you, so therefore it ought not bother them. Buncha onion-skins, t'heck with 'em.