iPhone does not charge after horrendous attempt at replacing battery

I stripped the screws which held down the battery connector bracket. I, in my utter stupidity, decided to pry the metal bracket open with SCISSORS. I could then plug in the new battery in to the phone. But after sealing up the phone and turning it on, I found that the phone would not charge. I tried backing up my data but the phone would restart every two minutes or so. And I tried putting the old battery back in again but now the old battery won’t charge too. What should I do?