Here are your options for a freezer:
1. If you had a Lupe you could use the
Ancient Lupe Wand which is a 100% freezer that sells for around 20,000 np. The drawbacks are that it only works for Lupes (which doesn't help your Xweetok) and it is fragile - it can break for good, leaving you out 20k.
2. Stick with your
Green Frost Cannon for about a 9% or 10% freeze chance. If you value freezing the way I do, that still only makes this about as good as using an
Obsidian Dagger, so I don't recommend that anyone use this weapon at current prices.
3. Spend about 20k on a
Snowglobe Staff and get used to frustration. The good news is that it has about a 20% freeze chance. The bad news is that 3 out of 5 uses it is actually worthless, and it can break before you get that freeze. Still if you value freezes the way I do, it's miles better than the Green Frost Cannon.
4. Try to wiz-snipe for a
Scroll of Freezing or a
Terror Stone, which average around 80k, but can sometimes be found cheaper. Both are 100% freezers, but both are highly fragile and will break for good after a few uses.
5. Save up a few 100,000 nps for a
Rainbow Frost Cannon or a
Black Frost Cannon. This isn't feasible for you at your current budget.
6. Save up a couple million for a species freezer, the cheapest of which is
Entangling Lenny Lasso I won't list the rest, since we're way out of your budget and none of them help Xweetoks. (nor will neopets ever release weapons to help Xweetoks.)
7. Save up a couple more million for a
H4000 Helmet. Now we are talking about roughly 100 times your current budget, and this is sadly the only good option on this entire list.
I should also mention that it will be worthwhile for you to train to level 6 and release 3 bottled fire faeries to get the
Fiery Gaze ability. You can do that for under 20k, and it does have roughly a 1 in 8 chance of freezing, and it can be used in conjunction with a freezing weapon.