Thanks for your input!
cissrawk pushed it thru for me. His words on the topic:
"You have a lot accelerator choice, first is via btc https://pool.viabtc.com/tools/txaccelerator/ but its just accept 100 transaction/hour and fee isnt less than 10 sat/b . Second is https://www.antpool.com/user/prioritiseTransaction.htm , you need register first to access it, can submit multiple transaction in one time. Third is https://confirmtx.com , the easiest because no need to register and doesnt have limit, but if your transaction size is more than 500 byte, you need to pay them $4, if not then it will free."