Dropped my iPhone 6s. Hardware is broken. Need to delete personal data from phone.

I dropped my iPhone 6s.

The phone broke. The screen came out, and an edge of the screen broke. Some of the other hardware pieces broke too. At first the phone was lighting up, but the next afternoon it wouldn't even light up anymore.

I am not interested in keeping the phone, in fact I intend to send it to be recycled. However, I want to delete my personal data before I send the phone to be recycled.

Since the phone wasn't responding, I tried to connect it to iTunes on my laptop, but iTunes won't recognize my phone. My situation is:

• my 'Home' button isn't working;
• my phone won't hard reset;
• my phone wasn't synced/backed up in iCloud;
• my phone wasn't synced/backed-up to my laptop's iTunes. I only connected it to my laptop's iTunes once, when I wanted to erase the previous person's data, when I initially got the phone (it was a second-hand phone from someone at home).

Could someone please guide me, and tell me how I could delete my personal data from the phone?