Hi and very late welcome from me!
It seems that you are still at square one! I suggest you return the guppies and do a fishless cycling.
Here is a very helpful guide that will help you to do just that.
http/www.fishforums.net/index.php?/topic/113861-fishless-cycling/
I hope you don't give up on the hobby! Once you are cycled, you'll see, there is a lot more to it!
It seems that you are still at square one! I suggest you return the guppies and do a fishless cycling.
Here is a very helpful guide that will help you to do just that.
http/www.fishforums.net/index.php?/topic/113861-fishless-cycling/
I hope you don't give up on the hobby! Once you are cycled, you'll see, there is a lot more to it!