We have been going to Porta de Mazarron on and off for the last 10 years, and wehave walked all around the
port and have never seen a Bankia in the Port, that is why we had to go to Mazarron if we needed to to go
to the Bank it self. Bankia web page is not the best, try to send a message, ring or e-mail them, best of luck.
If I am wrong then I stand to be corrected juan.
all the best