I generated a Segwit dogecoin address from coinb.in.

It gave me a Segwit address (begins with A), a redeem script, public key, and wif key.

I funded the address it gave me, with 359.05 DOGE - https://live.blockcypher.com/doge/address/A6CqeniSjuEp2G5R1JfvPP5cMqEm2qQZiQ/

Now, it won't let me spend it. I can't import the WIF key anywhere. I should've imported it before funding it, i know, but it's too late now. When i import the WIF key into another wallet, it instead imports the corresponding Legacy address (beginning with D) instead of the Segwit address.

Are my funds gone forever, or is it possible to access them?

If it's not possible to access, why does coinb.in even offer segwit as an option in the first place?