re my DLA appeal

Hi i am trying to find some help with my DLA Appeal and over payment Appeal it is on 3rd September. This has been going on for just over a year as i had an interview under caution and they had surveillance footage off me pushing my granddaughter in a pushchair which i have back up from specialists to say this helps me alot as it has wheels etc. This was taken on to different Tuesdays the whole off the footage lasts 8min's 3sec that is it over 2 different Tuesdays. But what they are saying with the evidence they have put in basically non off it is on the footage
i have managed to get quite a few Letters from different specilists out linning my conditions and also a short letter from my GP as at first he wanted to wait until the DWP wrote to him but as we all know they don't seem to bother doing this. they stopped my money back last june/july and are saying they are taking it back to when my granddaughter was 1 as i have her some Tuesday's which lifts my mood and self worth it does not stop or take away my medical conditions or my chronic pain.
I have now had to contacted the Health in Minds as im not coping and my family are basically fed up with me as i keep l;losing the plot with everything and anything
Any help would be very much appreciated as im at my wits end with all this now
Thank you SEH

thank you for replying it's a shame you can not help as i have been every where for advice and help but i understand and thank you ill see if i can get my refund now
SEH