Audi q7 from new issues

I've been on the thread for the juddering and hesitation issue

My car was bought brand new 2018 black ed (68 reg) and was OK for couple of months, then 4 months in car starts shaking violently at a red light. After multiple times back n forth to the dealership they finally found my issue but no fault code to learn how to fix. 

Last month may 2022 car cam up with multiple amber warnings (electrical fault, air suspension fault,suspension fault, electronic handbrake fault) so I though I'll call the dealership in the morning. Next day driving kids to school all fault lights started pinging red. 

So paid recovery to garage (not audi but to someone I trust) 48v hybrid battery done so replaced then fitted but something was draining it so much. Fault now dc convertor which I don't know will fix the issue. Final stage of motor ombusman which upheld in my favour only dealership has contested this. Anyone got any further forward with their dodgy q7