You've got another think coming - you will have to rethink your position.
Example - ""If you think I'm going to stay right here and listen to your complaining all day, you've got another think coming"
Image - https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhk08bZgo2k2enwzWKV5KirHG_FoCcWHI7wUyqVM025nfoDYq2YEgm0Z4cXL9CWTodt8ohTVi50dG5I0EAwILehyphenhyphenEEVQb-qn3fft3Yc-vzT52JM9IlDSVgMCWkwv6Bx_agfar7uOGRTMuU/s320/you%2527ve+got+another+think+coming..JPG