What worked for me:
Find the a-record for your subdomain. Assuming it's flipshopee.000webhost.com for you, this appears to be 18.104.22.168 according to who.is.
Go to your domain provider (same place you edited the CNAME). Change the value of the a-record there with name @ to your subdomain's IP address (i.e. 22.214.171.124). Make TTL 600 or something else suitably low.
Wait up to 5 minutes. If it doesn't work, let me know that I clearly don't know what I'm talking about.