Cancelled Flights, Lost Luggage - No response to claim, no way to contact KLM, No updates - Very poor service

After cancelling my flight and then rebooking me on another flight my luggage was lost by KLM.

I was told I could claim for the additional accommodation and clothes I needed to buy due to the flight cancellation and lost luggage. This was done almost a month ago on their website as per their request.

I have been unable to find any effective method to get an update on the progress of my claim. One is directed to their website which provides no effective information. What do I have to do to find out when my claim will be honoured? Poor Service and product! Avoid KLM.