Welcome to CHR!

This is a tough first post, kfox. I can tell you that everyone on this site has done something similar. It doesn’t matter if it’s twenty or two-hundred; when the deliverables do not meet my expectations I’m not happy. As I see it, you have three choices:
1 – Send the block back, pay the two hundred and tell them, “I’ll never deal with you again!” Outcome – nobody wins.
2 – Send the block back, pay the two hundred and get a new roller block. Outcome – they win and you smart a bit, but learn a lesson and believe me, if it’s the most expensive one you have to learn you’ll be miles ahead of me!!
3 – Call them up and admit to your “confusion-in-your-elation-to-order-the-killer-block-setup!” Tell them you really want to make this right and still use their services. You’ll still pay the 200 – but ask nicely (as Pat suggested) about a deal on lifters, or some other parts that they may be able to help you out on. Outcome – you’re still out the 200, but it’s closer to a situation where everybody wins.

I screwed up a cam install one time and destroyed a lobe before even firing up the engine (long story – don’t ask!) I went back to the machine shop where I had the block prepped and showed them the cam and we all agreed it was my fault. These guys must have taken pity on me because I got a replacement cam at their cost and a $25 gift certificate toward future work. That was a huge deal for me in the 70’s and I never forgot them – used them for lots more machine work until their shop closed,

Good luck and let us know what works out!
Glenn