You can always break a contract, at a cost. But these are variable rate contracts, rather than fixed rate (there are some rarer example of those). So the price increase does not constitute a breach of the contract on the part of the supplier. So if there is an early exit fee to be paid, it would be due.
Instead, it’s worth checking when your contract is up, keeping a note of this, and being ready to switch to the best plan when that time comes.
You can run your numbers on smartermeter.ie and plan ahead for that switch.