How someone attempted to scam me

I was scrolling through Facebook this afternoon when I saw a post about what to do to make money online. So the poster asks those interested to drop their phone numbers, I dropped mine. So this person added me on WhatsApp and we got talking immediately and from the conversations, I knew he was a scammer, as he asked me to invest money and get the double in 3 hours. I started playing along, the scammer started showing me fake testimonies in order to convince me into putting my hard-earned money into his money doubling scam.
Phone no: 09138703616
Bank Details: Ajayi James-Access Bank – 1435460274
Please don’t deal with criminals like this.