I just want your help SBSA Home Owners Insurance...since I pay for it!

I logged a subsidence claim with the SBSA Home Owners Insurance on 22 Nov and was advised that I would be contacted within a day by the assessor to arrange assessment. Despite many calls to a host of *********** Call Centre staff at SBSA Home Owners Insurance Claims department, the assessor only called approx 2.5 weeks later to make an arrangement to see me 4 days later (now 3 weeks after having placed my first call to them). The assessor has since visited & rejected my claim after having discussed the length of time since the subsidence issue first came about with my 17 year old son ( a minor) in my absence.

I have sent countless emails to countless email addresses / placed a few calls to SBSA HOC Claims dept requesting the actual reasons for the rejection (as provided by the assessor in his report - which I had to chase up myself), which I'd like to appeal - no response, or even acknowledgement, of any submitted attempt for feedback and when placing a telephonic call through to SBSA I get blind-transferred from pillar to post until I eventually hang up (I would also like this investigated).

Whilst waiting 3 weeks for the assessor to make contact / visit my residence to conduct the assessment my garage floor further sagged into the ground, to the extent that when pulling into my garage on one evening my vehicle's front bumper and undercarriage were damaged.

I would like for a Senior Manager in the HOC claims dept. to contact me to discuss my options as I've done had it with the long line of *********** Call Centre staff I've had to deal with in this +1 month period.