the people who made and set in the head stone 'have' to come out and put it right, there was a big probv here recently with council forcing them down trying to make people pay £100's to have ground work done and them re instated (council held hands up in end and paid for damage their bloody machines did as grandad/gnana's was one of them), but after only such a short time, they are def at fault.
did you take out insurance with it?, not that youll need it as its less than a year