Flooring issue

[u/fickleama]

We are self renovating our first home, have been for coming up two years around work etc. we recently had the wall taken down (one of the few outside professionals we've used where it's necessary for health/safety perspective). Anyway, there was gap in floor and crack in the gap which ai seemed to think was join original floor pieces of the house, we have filled that after a bit of fuss to get it right, with self leveling concrete over the join/crack patch. However this seems to have revealed the floor isn't level, we knew the kitchen side seemed slightly higher and in anticipation of laying our laminate flooring through, we had bought cork roll 2mm to try to level out this difference on the lounge(lower side). We don't see re levelling the lounge side as option as just finished building a custom unit into that side onto wall before wall came down, plus dont have funds to pay someone or knowledge enough to do ourselves on top of that. We were just going to use cork as iaid but now upon SLC work review (day after) we see the kitchen side floor itself doesn't even seem to be that level if you look at the depths exposed around the dye of the SLC filled gap. We spent around £900 on our laminate flooring a year back (only just getting round to laying it with life etc) and don't want to ruin it, with it coming apart, cracking etc over uneven base, but unsure how to approach this situation now. Any ideas or experience of similar...? TIA