mobile line plan messed up after call for a promotion

If the customer service agents who served me knows what exactly you know, I wouldn't have got such a mess.

finally I got the last month bill corrected by contacting other agents on the last billing day. However, now I found still I have 4 lines with unlimited in my plan, amazing how the last month bill got corrected! and only two lines back to the data sharing plan.  really disappointed with Xfinity customer service, so many unprofessional staff and behaviors. 

I am contacting again with Xfinity agents now and repeating my story again and hope all my 6 lines back to the 10GB data sharing plan, a very simple request, but so difficulty to get. looks like the agents I got are working hard to create problem instead of solving problem, which makes sense to keep them busy and continue the job

now here is the updates: the agent told me my next bill will be based on 10GB data sharing plan(for all my 6 lines), when I asked how about my current billing cycle, he told me it will be charged according to the current: 2 lines buy the gig plan and 4 line with unlimited plan. He think he resolved my problem, and that's is exactly when I want to resolved, how I can trust Xfinity customer service like this? I can NOT trust what I hear and see.

Another contact I called Xfinity and the agent said she reported this and the charge of my current billing cycle will be adjusted to reflect the correct amount.

I will have to wait to see what actually will happen.

will keep this post updated after this billing cycle ends

Notes:

my previous billing statement shows all my 6 lines are in the 10GB data sharing plan, that why I thought the problem resolved; but yesterday after I login my account, I found 2 lines are with the By the Gig plan, 4 lines are with the unlimited plan. How the plan was changed from the 6 lines of 10GB data sharing plan in the previous billing cycle to the current 2 by the Gig+4 unlimited plan is a mystery