Highly Disapointed & Upset

I was involved in an incident on the 31st December 2014 whereby my motor vehicle Hit the pavement leaving my front two tyres damages and the back right hand side punctured. The car was towed and taken in for repairs - all was Fine. Then came the day when I was told my vehicle was ready for collection, I went to go collect it and to my surprise I noticed that the front left tyre was not repaired/replaced. I made many attempts to contact Hollard contact centre and each time I called I was advised an assessor will call me back and arrangement to have the vehicle assessed, to date none of that has been done. I managed to get hold of the assessors contact number (Rudy) gave him a call and advised on the situation who then told me that the front left tyre damage is not related to the incident but could have hit a pothole before. This really made me angry but I did not want to engage in an argument with him as it would get nowhere. I will do everything to make sure the issue is escalated as this is a safety issue and I would of expected Hollard Insurance to have sent out someone to assess my car by now . I feel it's not safe to drive - I need an urgent address with regards to this.