Possible to merge 2 accounts or transfer one phone to the other account?

I bought a phone for Xfinity mobile and a month later bought 2 more phones. When I bought the other 2 phones, the person at the store accidentally set up a 2nd account instead of adding them to my existing account.

I'd like to consolidate these phones into one account. Especially with the upcoming changes to the By the Gig pricing. I've tried getting this resolved before but with no luck. If the accounts can't be merged, can the phones be released and transferred over or something?

It's really frustrating that I'm getting charged for two separate shared data pools that should be only one shared data pool and it's going to get worse with the changes in February.