Don't overpay for your bitcoin transactions. Use segwit addresses, set custom fees, enable RBF, audit your transaction fees on transactionfee.info and ditch the those wallets that constantly disrespect you as a user.
You can usually increase the fee of a transaction that is taking too long to confirm. Just tap on the unconfirmed transaction and tap Increase TX Fee. There is nothing support can do to make your transaction confirm any quicker.