Not abiding to agreement

Bought concrete mix and plaster sand from Mativon on Tuesday 08 December. Supplier promised to deliver on Wednesday 09 December. No delivery from supplier and poor communication on the status of delivery. Part delivery was eventually done on 10 December. When calling the supplier for update she refers me to her supplier. The other supplier which is incredible sand is not taking my calls. 2 days of work wasted as my contractors are sitting and not doing anything for 2 days. Never ever use Mativon, bad service at its best.