Last second switcharoo on Trade up program ripoff.

Constellation

Last second switcharoo on Trade up program ripoff.

So I decided to trade up my cracked screen S7 edge for an S9.  I go through all the screens, at first it indicates that I will receive $100 credit, NP.  Then, just as they are asking me to enter my credit card for payment in full, the Credit changes to $50. No explination anywhere. I started over 3 times and got the same result every time.  Had I not been paying close attention, I would have lost the $50.

It seems like Samsung is pulling a fast one, has this happened to anyone else?

Derek