Login to Apple ID
It's saying maximum number of free accounts has been reached, how do i resolve this? i want to sign in my apple ID
iPhone 6s Plus
The above article tells you why this can happen and it has steps that you can try too
Apart from that, you can try using another Apple device to create an Apple ID or you can also create an Apple ID at https://appleid.apple.com/
View this article for more info
How to create a new Apple ID - Apple Support
Contact - Official Apple Support for further help