What a shame so many weren't up to scratch Shireen, I hope CS make you a happy bunny again.
The little Tookalon bracelet is DEFINITELY worth a replacement, it's a lovely thing and I think the damage is a one-off, mine doesn't have that problem.
As for tarnishing - well, I hate to say it, but I've had a fair few bits arrive tarnished, and it's all down to the packaging. It looks the business, but no non-airtight cardboard box is going to stop silver having air get to it. I've accepted my bits that way and cleaned them up myself, but as stock gets older it's going to get worse apart from things like earrings that are sealed into plastic bags.
Shame about the opal too, I've had half an eye on it, though I wouldn't expect the world's finest opal at that size and price. Will probably give it a miss now.
Enjoy your keepers anyway, I guess we all have a bad haul from time to time, it's when it's every time that we drop the company - and I guess also how they react to your issues. Good to see Tony on the case already, that's why we still love Rocks despite a few issues from time to time!