Hi Awais. We’ve tested HotZoc with all popular smartphone operating systems including ios. If HotZoc is the only website you’re having this issue with I think it’s most likely caused by cookies and other website data saved to safari.
To clear your history and cookies from Safari in iOS 8 or later, tap Settings > Safari > Clear History and Website Data. In iOS 7 or earlier, tap Clear History and tap Clear Cookies and Data. If this doesn’t fix the issue please let me know.