Poor communication

I booked to fly to Amsterdam ***4, returning ***8. I received an invoice but no ticket. I called a local number to query why and had a conversation with someone with a French accent. We had difficulty communicating. The call centre was in Mauritius. I went to the address on the invoice. They initially refused to let me in. I parked my car at the booms and walked in. Eventually I was let into the office. The person who helped me had difficulty with the website. The reason I am posting here is that it is difficult to register a general complaint on the KLM website. I sent a message to *** which was not rep**** to. The seats were very comfortable and the food was good