The mempool hasn’t got pass the 20 sats/vbyte fee rate in the last 1 week so your transaction might definitely still be in some nodes mempools, since even the mempool.space purging fee rate is still around 10.5sats/vbyte currently. But you can check this if you’re are able to import the wallet seed phrase into electrum. Try to switch electrum servers and see maybe some might have dropped the transaction from their mempool. If it shows local in any of the servers, then you can delete that transaction file and rebroadcast new one with a higher fee.

If not you will have to wait for the transaction to either be dropped or confirmed, which sometimes exceeds that 14 days. There is nothing like cancellation of a transaction what you’re doing there is spending the transaction back to the address it is coming from with higher fees