Pip complaint and MR

I went from standard rate daily living and mobility to no award following a review. I believe I should be receiving higher for both due to decline in mental health and mobility. I submitted my mandatory reconsideration and complaint to hass at the same time. I've had a response to my complaint saying it was passed to a higher person, giving feedback to the clinician who carried out the review on significant errors in the report and they are suggesting amendments to my report( to what it was before) and giving further advice regarding other descriptors, not stating which, given the further evidence I sent with my MR, around being housebound with severe anxiety/agoraphobia that was available at the time of the review and more after, which hass has acquired somehow,( I was under the impression the complaint and MR are separate things)have alot of evidence and statements from social link worker, pcls, gp, friend and my son sent with MR. It then states they can't say if any of their advice/ammendments will be considered and offer £100 good will gesture. I'm just wondering if it will be likely my award will be reinstated and now recieve higher rate given advice they are giving dwp. Also should I accept the £100 or wait untill I get the MR decision, and can I ask for a copy of the hass new recommendations. Sorry its alot, bit overwhelming.