Unhappy with service provided

I logged an incident with your service centre on Wednesday the 23rd. You called to confirm that you'll send the technician. Firstly he came very late in the afternoon. He defrost the freezer and replaced the the fan. He didn't have the temperature censors so he said he'll come Monday with them. To total cost for the work he did was R450.00 call out fee plus R1282.17 for the fan amounting to R1772.17, however in the invoice after I've paid this amount things don't add up. I called him requesting that he email me correct invoice so that I can submit a claim to my insurance, I've been waiting since last week for this correction. Bosch claims to provide life guarantee support but its a joke. ****ED. People should not buy your appliances. YOU SUCK