Replaced battery and charging port, does not vibrate or charge.

I’ve owned my iPhone 7 Plus for about 2 years now, as all iPhones the battery has all of a sudden started to discharge very quickly and the charging port would only work with one charger in one direction. I purchased a replacement battery and charging port and replaced them both. I have replaced batteries and ports in iPhones since the iPhone 4, but the 7 Plus was by far the hardest I’ve done. After the phone was all back together and I powered the phone on the Apple logo appeared on the screen for a lot longer than usual, and twice the white background flashed to black and then back to white for awhile. Once the phone finally reached the lock screen and I unlocked the phone, I noticed that A: the phone would not charge (The new battery was only on 1%), B: there was no vibration when I pressed the home button, although it still functioned, as well as Touch ID, and C: Force touch no longer works. What did I screw up and how can I fix it. This is the first time out of countless phone repairs that I’ve ever had any problems like this, but I really don’t want to dig that deep into the phone for a second time. Thanks in advance.