So who redraws them and who gave them the right?

The states have the right to control the size and shape of their districts and is pretty much always done after the census which occurs every 10 years. The redistricting is supposed to be done to account for changes in population, but as you can see now Republicans pushed for a mid decade redistricting for reasons purely about political power, it has nothing to do with representation of people where the total population has changed.