iphone 7- ios 12.0 (16A366) freezing problem

hi

apple has been my companion for 5 years now, which have been a great experience so far.

this time I have updated my iPhone 7 to 12.0 version since yesterday my iPhone working has become worst.

unfortunately, I'm having issues such as screen freezing, call hanging, unable to make calls and few more. I have come across other forums and discussions and found so many folks having such issues with ios 12.0 and surprisingly no one have any solution.

I am really dissatisfied with the experience and services this time and request apple team to provide prominent support to their customers.

Thanks