SCAM? or Paranoia?

So.. I’m just learning about bitcoin because of a coworker of mine and had used Coinbase to purchase BTC. I got a promo code for the website deluxbit.com, made a profile and used the promo code & It immediately said I got 0.29 something in BTC. Long story short - I’m pretty sure I was scammed into sending 0.0005 BTC to my wallet on that site but I can’t find anything on how to delete this “deluxbit” account I just created. Prior to making the account I seen the site was “seen on business insider” and other well known companies, but after I seen the amount it definitely seemed too good to be true. I feel like the longer I leave the account up the more likely I will get targeted for my personal information used to create the account and I want it to be removed as soon as possible. It states “Reliable Security Infrastructure” and the site is built pretty well. Their 24/7 customer service is just as responsive (or the same lack of Human response) as Coinbase so, I really don’t know for certain. On blockchain it says “This transaction is efficient, no issues detected.” It was basically $15 USD and some change that I transferred to this other wallet but I still feel funky about it. Can anyone confirm this site and it’s legitimacy? If anyone knows what I should do with this information please let me know. This is my second transfer I’ve ever done so I am very much a noob when it comes to Bitcoin.