FUMING CUSTOMER

I don’t know what it takes to get you guys to respond to me, I am FUMING. I sent back defective Headphones and the charging cable within its original packaging as requested. When it was collected the driver didn’t bring a plastic slip with it and put my product in it as collections usually go. I asked the driver where it was and he said not to worry he will do it for me in his car. I showed and confirmed with him that all headphones and charging cable was in the packaging, and off he went. I didn’t receive any slip to confirm with me that you guys have received my product nothing. I then get an email stating the charging cable is missing and if I can confirm a time for them to collect, also I have 48 hours to mail back or they will return my item as is. THIS IS UNACCEPTABLE, and I will not accept this, I sent back the product I received as is and now somehow items are missing. Also giving a customer a deadline to respond or they will get their product back as is, is EXTREMELY unprofessional. I have emailed back 5 times over 2 DAYS!!!!! AND NOTHING FROM YOU GUYS. What is going on? I will not accept that anything is missing from my side as I confirmed with the driver and it's not my responsibility when it leaves my hands in tacted that now items have gone missing. I want someone to contact me IMMEDIATELY and tell me what the hell is going on there.