Navtool Inc Would not accept return and sending threatening emails with lies Staten Island New York

Purchased a $549, $494 with discount for Apple Carplay interface. First of all no communication from them until I reached out on the shipment of the item. Finally the item arrived. Took to get installed at 2 different professional installers. Both installers had issues with downloading the correct download for my vehicle. It gave options for a different vehicle, we downloaded the option for what we thought was my vehicle.

We reached out to tech support only for them to say, yes we see this "call us back in 30 minutes and it will be corrected". Called back 1 hour later and nothing and no one knew of our conversation. We made no less that 25 calls over a 48 hour period. I reached out NUMEROUS times via their preferred chat to no avail.

They didn't wish to listen nor gave sound clear direction. The harness was installed twice by different installers and did not work. The Carplay had no sound. While with the installer I called 5 times, all 5 times they attempted to transfer me to someone named "George" the calls never were transferred but were disconnected. Not once but 5 times.

I finally called customer service and it sounded like it was the same person that had an attitude, was unprofessional and seem bothered by the inquiries. i asked about returning the interface or what I could do about the harness and he starts banging on the headset, boom, boom boom and they call gets disconnected.

The problem with harness as I saw with the last installer, is while installed there was no volume with carplay. But yet we removed that harness and we got all the features with AUX and volume. I attempted to explain this to the customer service rep and all he wanted to do was blame the installer. BTW i am still awaiting a call back from when they said press * for a call back from an agent.

Their own website states if "you are not pleased with the item and within 30 days of purchase they would refund the full amount. I tried doing that and was told I could not return for a full refund. There is nothing on their site that says installed or not installed. Oh and BTW I have all the chats copied and documented. And just in case my order number is14091079. 

Now they are attempting to intimidate after I called my credit card company with a complaint.  Sending various emails stating I commited fraud and theft.  Very funny considering I only reported them on March 28th and later that evening I start receiving threatening emails.  In their emails they stated that "my credit card company instructed me to return the item". 

Absolutely false, AMEX asked did I return the item, I answered no.  They advised do nothing us until you hear from us.  I will be sending the unit back to the address I have on file for Staten Island.  But I just found an address in New Jersey.  They refuse to send an RMA for the return of the item.