You can't send BTC to a BCH address and vice versa... you have exchange your BTC on a marketplace for BCH...
Now.. to get access to your wrongly sent BTC you can export the private keys of your recieving-BCH-address
and import it into another BTC wallet. You will be able to spend them from there on.
There are quite a few tutorials online to export your keys from JAXX and to import them keys into another wallet, just google it.
Same private-/public- keypairs, same transaction history until block 4xx.xxx.
Of course you can recover wrongly sent BTC's, with easily importing the BCH private key into your BTC wallet...
Thank you so much for your help! I managed to get my coins back and learned my lesson.