They bought my home loan from chase. I loss my job...

They bought my home loan from chase. I loss my job in 2017 so had to do a modification. Started process April 2017. Have made modification payments since, on time, they have misplaced loan assumption paperwork twice now and here I am 2020 doing this paper work now 3 times. Each time they run my credit and it drops 50 points (3 times total). I mailed in everything and even videoed me placing every paper in the envelope (lawyer suggested I do so) and guess what. They responded there was paperwork missing and it was papers that I in fact sent in. This place is horrible and am perusing legal recourse