I would say to report the theft too. it should not be too hard to track it down, unless he sold it.
Its a small price to pay, however, for freedom from the misery. I hope you are doing well. keep doing the right thing for you and your child, one day at a time. it gets easier.
welcome to SR. You will surely find others who understand and want to support you.
And depending on whether you live in the U.S. or not, you may qualify for a free cell phone, food stamps, rental assistance, etc. depending on your income.
best wishes!