4” stamped concrete with rebar. Was cut 24hours after pouring. Got cracked after a few days. Could be because the cut or wait too much to cut the concrete? It’s pretty close to the control line so I was wondering what are you thoughts. Thanks!!

A contractor did a stamp concrete last fall at my backyard around 350sqft. It was a bad timing that the mix truck arrived while a pouring rain started and kept go'in several hours. The contractor insisted finishing the work. It's proved a mess!!! The surface won't be able to seal properly...