i am the receiving part and it seems it's almost impossible to contact the sending part, an exchange firm that does not answer to my call... :-(
would it help in my case to use paid accelerator service from pushtx.com? an estimated cost of accelerating my tx is $788.53 according to the site, btw.
i don't know what to do...
There are a few people around here on this forum which have access to mining pools.
They may confirm your TX into their next block. But this will definetly cost 50$+.
You might also try to wait until the backlog of transaction has calmed down. Then you can try a child-pays-for-parent transaction.
In such a CPFP-transaction you are sending your (non-confirmed) output to another address of yourself with a fee which is big enough to cover both TX fees.
If a miner comes across your 2nd TX he will then confirm both of your TX's if its lucrative.
Currently this would exceed the amount of BTC in your transaction.. but after mempool has cleared its a viable option.
Until then you can either pay a huge amount to get your TX into a block by a miner or you just wait until the mempool has calmed down.
But definetly keep on contacting the support, with 50 sat/B it could take forever to get confirmed (or won't get confirmed at all..).