There are lots of other threads about this problem for the verizon message+ app
It is un-acceptable to have any app that allow the creation of something like a text "group" and then have no way to delete this group from the app.
I've followed all the threads about this and none of the directions or instructions actually work. For example, one tells you to go into the groups using the search icon on the top left and select groups - then delete the messages thread here. This is not where message threads are, this is where the actual group entities exist - and there is delete here anywhere or by any reasonable way of long-touch or short-touch. These groups do not timeout and disappear after one thread said they would - the ones I am trying to delete are at least a year or older. A group text thread and a group "entity" which has the list of names for the group are NOT the same thing.
Someone from development, needs to pay attention to what all the users are actually complaining about - and not respond with incorrect or meaningless answers.