Again from the booklet:

 

• When there is a major failure with a service, a consumer can choose to cancel the service contract with the supplier and get a refund ...

 

AND

 

• A consumer can claim compensation for consequential loss from a supplier who failed to meet one or more of the consumer guarantees.

 

AND

 

• The consumer can apply directly to the supplier for compensation.

 

I have already applied to the supplier Murone/Pave-Crete for refund. 

 

Here's how I calculated the amount: