lucretia89, i have 1 transaction with same fee as you. and i'm waiting already more then 2 weeks.
normal fee for today 650 sat/B and your fee 271.248 sat/B
so no way( acceleration will not help.
if anyone know how speed up transaction with 100% guarantee i will pay for help.
yesterday i send transaction from blockchain with priority fee and also 0 confirmations till now.
TX ID:05fd28901eb8ea81b98b310f4945d5b3fd1d33c3b289dbf93976f4cff6c0ee46