Is cryptocurrenciesinvestmentllc.com Legit?

Beware! The person named as Robert Michael who is saying himself as account manager of this website, Cryptocurrenciesinvestmentsllc. My friend found his details from Facebook, after contacting him, He told us to invest in his bitcoin mining program, and asked my friend and me to deposit a minimum $300 for 72 hrs, so that, we can get a very good return of the money within 72 hrs and can able to withdraw the money after 72 hrs.  I have registered on his website which I have mentioned above and initially started investment of $300 and Next day looking good amount of increment at on the screen invested more amount by transferring bitcoins at his wallet, Robert also suggests me to add more deposit to promise to get a big amount of returns in multiples of 10-20 times as figure mentioned on his website after I logged on. I transferred bitcoins and deposited more than $1800 amount to the wallet mentioned on his website (display during deposit option). Next day we received an email, that we need to pay an additional amount of $610 as an account maintenance fee, which he never mentioned earlier and we need to transfer and deposit additional bitcoins of $610 for both of our accounts (me and my friend's account created on his websites).  We argued and discussed a lot with him, and asked him to deduct that maintenance amount, once we were able to withdraw our profits, but he didn't agree with that, and we communicated with him multiple days and during that duration, we tried to withdraw the deposited amount, but we failed, as our withdrawal request was showing as pending, we were not able to withdraw any money from that account created on his website.  We requested him a lot and multiple days, then one day he asked us to deposit $300 and told that the remaining $300 he will add to our account as a maintenance fee, After a few days I have deposited an additional $300. My friend has not deposited any amount, even after lots of pressure and request made by Robert. After transferring an additional $300 at his website mentioned bitcoin wallet, I tried to withdraw my capital amount, but even after that, I failed to withdraw none of the amounts, when I contacted Robert and asked him, then he told me to deposit an additional maintenance fee amount of $300. I found it suspicious on that website and understood that he just wanted to take more money and didn't want to return any amount including our capital amount. Even after requesting him a lot, he is not returning back my Capital Investment of $2100 and my friend's Investment amount of $300. I request you kindly block his website and blacklist the same, so no other innocent person like us loses any money. Also if possible kindly try to contact the website owner and the Account manager Robert Michael (https://cryptocurrenciesinvestmentllc.com) and request them to pay back our money. Whatsapp contact of Robert Michael is : +1 (586) 574-7380, who is showing himself as account manager of cryptocurrenciesinvestmentllc company.