A 403 error means the Tata Play servers have blocked the request. Ensure that you are not using a VPN server blacklisted by the provider, and check that your underlying subscription plan is still active and fully paid. To help narrow down your setup, tell me: What are you planning to use to watch your playlist?
A personalized .m3u file is generated, which you can load into your player. tata sky iptv m3u playlist link