Unconfirmed incoming transaction for a long time I received BC from currency exchange provider. Is unconfirmed for a pretty long time. Is this standard waiting time or maybe sender did not provide enough fee? I didn't have any choice what fee he payed and I think it is not possible to pay it after the transaction...
Thanks for the input.

https://blockchain.info/address/19oaganA4BN4khDn1kno6mctxLKSmFadk4
The fees are quite low indeed. If you check the transaction instead of the address, you can notice that they are paying 51 Satoshi/Byte.

According to bitcoinfees.21.co, the recommended rate to get a transaction confirmed as soon as possible is around 220 Satoshi/byte nowadays.

So, what you can do is either wait until the transaction get confirmed, or spend the UTXO by creating a new transaction with a high fee, following a Child-pays-for-Parent (CPFP) approach.