Standard Bank Insurance Company fails to complete job leaving me in ****

I have had a terrible experience regarding a recent claim with the Standard Bank Insurance company. My bond, bank accounts, and buildings cover are with Standard Bank from inception. On Sunday 08/11/2020, we noticed that the sewer pipe at home is blocked and that the sewer water was standing in the drain and overflowing into the yard. We immediately called the insurer, logged a fault, and received a claim no. 20/094225. I carefully explained to the lady that we need a plumber to come out to us to unblock the pipes. She told me that someone would come out to us by 3 pm. 3 pm came and no sign of the plumber, we called the insurer again and they told us that they had to source a different company so we can expect a plumber by 5 pm. The company assigned to us was Phuthanang Ma Africa. We waited until 5pm and still no sign of the plumber. We called the insurer again and they told us that the plumber's name is Siyanda and he is struggling to find our place. So I tried calling him several times and even sent him our WhatsApp location. He did not answer or respond to any of my calls or messages. He eventually arrives at 7pm. He appeared to be in a drunken state, hence the reason he was 2 hours late. He did not have any tools in his van, not even a torch or a proper *****driver. When I questioned him about his drunken state and his non-existenent tools, he got very defensive and vulgar and stormed out of the property without doing any work. I called the insurer and informed them of my experience, they told me that they will send another plumbing company the next day. The next morning Dylan Plumbers arrives with the proper tools, they try their best to unclog the pipes, but they admitted that they require the micro jetting machinery to complete the job. Dylan Plumbers called Standard Bank to get authorization for the micro jetting. To my horror, the insurer declined the authorization. I have tried since calling the insurer to motivate for authorization for micro jetting but they are being stubborn as an ox. The job is incomplete. My sewer pipes are clogged, the ie covers are overflowing with feces, my yard is a complete mess!!! And my insurer refuses to help me. I am so frustrated and disappointed with the poor service received. I am going to cancel my insurance policy, move my bank accounts, and move my bond to another company. This horrible experience was enough for me and it's not over yet!!!