I am not sure what response you were hoping for?
"Hey bro, that's great. Sure... you did some diving with your friend who showed you some stuff. Here's a certification card in lieu of taking a comprehensive and regulated course!"
If you don't have a certification card, then you'll find it extremely difficult to source air-fills and dive boat charters...especially if you wanted to dive outside of the Philippines.
There aren't many businesses who'd be happy to take a diver underwater who had undocumented training, of an unknown standard, taken with a non-professionally trained 'instructor'. I can't blame them. You'd be a big liability for them.
Likewise, as you've recieved your training from 'some guy'.. who doesn't know himself exactly what and how you should have been trained.... then for your own peace of mind, I would suggest that proper training would be a very good step forward. You may feel confident about diving.... but really, 'you don't know what you don't know'.
PADI used to run a thing called the 'PADI Experienced Diver Certification Program'.
This was a cross-over scheme for experienced, but uncertified, divers. You had to show proof of 20 logged dives (logged and verified in a log book), complete all knowledge reviews, quizzes and exam from the OW course, complete a skill circuit of core scuba skills...and demonstrate those skills on 4 open water training dives.
There's no mention of that program in the current/latest PADI instructor manual... so it may have been discontinued. Perhaps another instructor may have an answer on that.