https://www.slab.org.uk/faqs/what-happens-when-i-have-complained/
We will always tell you who is dealing with your complaint.
Our complaints procedure has two stages:
Stage One – frontline resolution
We aim to resolve complaints quickly and close to where we provided the service. This could mean an on-the-spot apology and explanation if something has clearly gone wrong, and immediate action to resolve the problem.
We will give you our decision at Stage One in five working days or less, unless there are exceptional circumstances.
If we can’t resolve your complaint at this stage, we will explain why and tell you what you can do next. We might suggest that you take your complaint to Stage Two. You may choose to do this immediately or sometime after you get our initial decision.
Stage Two – investigation
Stage Two deals with two types of complaint: those that have not been resolved at Stage One and those that are complex and require detailed investigation.
When using Stage Two we will:
If our investigation will take longer than 20 working days, we will tell you. We will agree revised time limits with you and keep you updated on progress.