I've been all up and down the contact chain with Namecheap and quite frankly every time I make a stink about it in a public forum it's always the same playbook. "Yes a mistake was made, no we can't compensate you." Here is the reply from your support where you admit a fundamental systems flaw resulted in my domain being dropped:
"My name is Oksana and I am the Shift Leader of Domains Department. I would like to follow-up with you with regard to the issue you have faced with your domain name. We are very sorry that such unpleasant situation happened. We have reported it to our Technical team and they are doing their best to fix the issue that affected your domain renewal so that similar situations would not occur again. While we cannot change what has happened, we are planning to take steps to ensure that similar incidents and misunderstandings will not occur in the future. Unfortunately, we do not have any ETA on the fix implementation. Rest assured that as soon as there are any updates on this improvement, we will inform you via the ticket. Regretfully, we will not be able to recover your domain name, as it expired and later was re-registered by another Registrant. As a compensation for this negative experience you have faced, we can offer you the XXXX coupon code. You can use it to receive a 20% discount for registration, renewal, and transfer of domains."