Discovering infuriating insurance

I made a claim regarding my laptop on the 19th of December 2017, after it fell and the screen cracked. The company they liaised with for collection was supposed to collect on the 2nd of January, but only collected my laptop for an assessment on the 10th of January 2018. I contacted them on the 8th of February when I hadn't heard anything back in almost a month. The company informed me that Discovery had already collected the laptop from them. After many telephone calls and empty promises, it has been 3 months since my laptop was collected for 'assessment' and even after cancelling the claim, I still cannot get Discovery to give back my laptop. This is so unacceptable and seriously infuriating. How do they expect someone to work without a laptop for almost 4 months?! I'm tired of calling, I'm tired of trying, I'm tired of repeatedly regurgitating my details to consultants over a phone to no avail. Discovery Insurance has poor service and a lack of interest in their customers needs. I am gravely disappointed in the way I've been treated. Discovery should invest some time and money they so eagerly take from their customers to improve their service before they lose more of their customers.