Hello, I'm currently having an issue with my phone where I'll get a notification from the number 6879 about having a new mms message from someone. I have mms currently on auto receive so I don't know why this is happening
That sounds like the feature that is intended for phones that do not support MMS, wherein a link is sent in instead of the actual message. The most likely cause is your phone was misidentified in the MMS platform.
If you email your phone number and make/model of phone to firstname.lastname@example.org, I can get that fixed up for you. Alternatively you can give our technical support a call, they will be able to do this as well.