Not sure if it's a dust attack or not because the sender could have sent less sats than 800 (546 if am not wrong).
Anyway, what makes things worse is that even the parent transaction of the one you received is still unconfirmed. So, if you are going to perform rbf you'll have to pay for both of them.
You probably meant CPFP, right?
At this point, OP can not perform RBF because the unconfirmed ancestor transactions are in a wallet address he probably does not control. Secondly, the ancestor transactions are not RBF enabled.