IT sounds like they wrote down a lot of different numbers, without what they were for And why you would get a credit.
A List of possibilities and options isn't much help.
MY contract was on a tablet, which is what I read and signed. The only physical paperwork was the printed receipt after my sale. Any figures on paper were prior to deciding on my phones and plan options. In the end, my choices were included in my contract and customer agreement. It included printed information on credits I was eligible for and when they would appear on my bill.
Verizon has a lot of offers and credits for people switching service. There are fewer offers for current customers.
The offers have to be followed to the letter and they change often.