KFC India — extra money is charged on the bill from customer on the name of donation without informing them

Address:	East Singhbhum, Jharkhand
Website:	www.kfc.co.in

This is the message i sent to kfc:

Hi guys, i am a big fan of kfc and i want to bring the unwanted activity carried out at few kfc outlets to your notice, this is the incident happend on 31st august 2018 in kfc outlet at p&m mall in jamshedpur, india. I ordered for kfc krusher lime soda whose cost after gst was 39 rupees but they charged me 44 rupees. Then i asked them why have u added 5rs extra in the bill. To my question the lady on the desk replied that it's for charity and it gets added automatically. As i have been to kfc outlets in many parts of india and world and i know very well that she is misleading the customer so i politely asked for the refund of 5 rs to which she replied that it is not refundable then i thought why to waste time for 5rs, later i saw after me 5 more customers paid 5 rupees unknowingly and the customers is jamshedpur are innocent and they have faith in kfc that it won't overcharge them so those people least care of checking the bill or caring about the extra 5 rs they are paying. So if you accumulate 5rs per head per customer its in lakhs or crores. So, it annoyed me. I met the manager at that particular outlet and reported him about the incident, and firstly he was like why i am raising my voice for 5rs. But i told it's a matter of lakhs and crores of rupees which people are paying without being made aware of. So i asked for refund and he gave me back my 5rs. I raised my voice so i got that amount back. Is it not the duty of you guys to first ask the customer if he/she is willing to pay for charity and then add the charity amount?
I made a video on the same incident, and i thought of putting it up in social media channels but i believe it's unethical to take such step without making you all aware about it. The manager in that kfc outlet pleaded guilty and has requested me not to upload this video in social media neither i should inform it to kfc management and he promised that from here onwards they will ask and then add the donation amount but last week i just got information from one of our friend that the trend is still on. So, i just don't want to defame you guys. I just request you to take some affective steps against such things because this happened with me earlier in a pune outlet for which i have no proof. I just want that customers should be asked if they want to donate extra amount on top of taxes.