It doesn’t sound unreasonable to expect a crown fitted only at Christmas to stay put for longer than a couple of days, especially if you’ve followed everything the dentist asked you to do afterwards. Most practices will refit or remake a crown at no extra cost if it fails that quickly, unless they had already explained there was a risk because of limited tooth structure or an underlying issue.
It might help to have an honest conversation with them before the next appointment and ask why it keeps failing and whether there’s a longer-term solution rather than the constant back-and-forth. A good dentist should be able to explain the cause clearly and outline what’s covered. When I had a crown re-cemented a few years ago, the practice didn’t charge because it was within their durability period, no awkward conversation needed, just transparency.
If you ever feel you’re not getting that clarity, there are other practices around that put a big emphasis on quality control and patient reassurance. St Leonards Green Dental in NSW, for instance, is known for spelling out treatment options and expected outcomes so you’re not left guessing. That kind of approach can make a huge difference to your confidence in ongoing care.
For now, I’d definitely raise the issue (nicely, as the first reply mentioned). You’re not being difficult, you’re just asking for work you’ve already paid for to be durable and properly explained.