You really should try a combination of feeding more, dose KNO3 and KH2PO4, and reef roids. The point is to sustain an elevated level of nutrients to keep feeding the nuisance algae once they take a hold and there needs to be an excess in the water column too while doing this.
There are a lot success stories on this forum and you received a lot of good suggestions. It was trial and error and don't give up just because you tried it a day. It's a long process and you have to be in it for the long haul. Most of people who got dinos was because their nutrient levels bottomed out. Raising nitrate and phosphates should be your first priority but that doesn't mean you will eradicate dinos with just doing that you will need to have a plan of action. Dinos can be beaten, just don't give up.
What he said ;-), your 1st step is to promote green algae to outcompete the Dino. Once I understood that you don't kill Dino, you promote other micro and macro fauna that outcompete the Dino and then the Dino goes away naturally. It takes a bit of time for sure, but afterwards if you keep detectable NO3 and PO4, and a stable ALK of ~ 8-8.5 you shouldn't see them return.