Flex Senior Program Administrator interview questions

I applied online at the end of Jan. Interviewed on site after a week with the hiring manager, and after a week afted that day they called me again for the final interview with the site HRBP then she told me that I had my verbal acceptance from both the hiring manager and the site HRBP. But since that day (approximately 2 weeks later to now) I didn't get yet the offering letter. The TA team who contacted me is not even responding my text for following up about my status. I don't know it's a normal thing there or not because I've got my OL just a week after the verbal acceptance in my current also my previous company.