The Professional Couriers — Pro premium customer Letter not delivered and no proper response

Letter has been posted on 26/07/2022 in pro premium with tracking no : PRO13681640, since it was such an emergency letter. It has been 2 days since I sent the letter but still the receiver did not receive it. When I called Bengaluru south courier office to enquire on 27th, whole day noone picked up the call. Only on 28th they picked up to say there's a confusion in address. I have given phone no in the letter they would have easily contacted if there was confusion in the address. I is still not delivered even if its sent in pro premium. Why to cheat customers saying the name pro premium when you deliver it normally. Very very worst service greatly disappointed.