Poor service and Unfair practice of directing work to "Preferred " panelbeaters only

I have been insured with A&G for the past 15 years. First time I have experienced such poor service from Claims/Administration and Assessing. I submitted a vehicle claim and claim was authorised to Renew It. 6 working days after authorisation, i did not even get a call from Renew It. I then advised the digital assessor that i preferred yo take my vehicle to a repairer of my choice. Claims eventually forwarded me a disclaimer for nsignature. Before signing the disclaimer, i took the vehicle to the Boksburg assessment centre, as according to Mercedes, the headlight has 2 modules and the one is sold seperately. The assessor was adamant that according to the system, the module is part of the headlight, and payment will only be made for the headlight. I urgently needed to get my vehicle repaired, and signed the Disclaimer. I purchased the headlight PLUS a module. The module at Mercedes if R4500,00. The Mercedes repairer after fitting the headlight has to send the vehicle to the Merc dealership for the coding of the headlight. After phoning 4 Merc dealerships, they charge anything from R2500,00 to R4000,00 to recode the lights. PS - the Merc approved panel beater has the diagnostic machine, but cannot recode the lights. I tried explaining the recoding of the lights and the seperate module to the assessor, but to no avail. Cash-in-lieu and under payment from A&G. They also unfairly deducted 5% from the cash payment.