Recently hv my house renovated - completed but with many issues

Contractor only asked for initial 10% deposit, which has been paid.

My question is

Contractor said he was busy with other projects and hv no time for the final invoice to bill us - will this impact us?

Contractor did not do a proper job and said it is normal - crack walls and dented tiles (due to expansion and misc) - what should I do with this?

Contractor charge for cleaning the place yet did not a proper clean-up. Ultimately I have to reclean the house all over again

As a consumer, what should my next approach be ?

Any updates to share?