forcing R2 donation when buying KFC

KFC, your R2 donation campaign is starting to annoy me bigtime. Every time I buy KFC I get asked to donate R2. I have donated R2 on multiple occasions when buying KFC and simply cannot do it every time I buy KFC so I have started saying no when the cashier asks me. However I have now discovered for the 3rd time this morning after checking my slip that even if you say no for the R2 donation your cashiers are still adding it to the bill. I experienced this from you rondebosch and claremont branch in Cape town. I appreciate your initiative for this good cause but if you want to donate continuously then use from your millions of profit you turn annually. Do not put your customers under pressure to donate for your fundraising campaign. Dont know if I want to buy from you anymore, its rather off putting. There are other great chicken houses out there as well.