I would suggest to add some money into the account if you are not going to monitor the emails. I have a lot of domains with Namecheap and I've always for plenty of reminder mails from them about expiry.

For me, it looks like the problem is between the keyboard and the chair and not otherwise. Fix the emails and avoid future issues. Namecheap has been one of the best domain providers period.

I have had plenty of bad experiences and predatory and opportunistic billing with plenty of others.

I have been dealing with domains since the early network solutions days (I would comfortably say that it my experience is close to 30+ years and Namecheap as a domain provider is at the top of my list!).