In my opinion, asking for a rescore on the writing section is a waste of time since they are not required to provide you with any proof that actually did the rescoring. They only send a letter saying they did it and I have never heard of an essay score being changed in that letter. They have no incentive to change the score since they would have to return your fees ($75 or something?) if they did and also it would say that their essay readers are fallible (which they are) and the whole process is subjective (which it is). It’s kind of a scam in my opinion and free money for the organization since there is no accountability that they are actually doing the rescoring.