NGO Website for Problem Collection

We need a website for an NGO to collect and track people’s issues and suggestions. The site should include an online form where users can submit their problem, location, and the number of people affected. Each submission should be counted on our panel, and users must verify their mobile number before submitting. Every user should receive a unique reference number. The platform will support surveys and should be easy to manage for the NGO team. Please share your estimate for building this website and any recommendations for the best approach.