My coworkers complained that I wasn't working hard enough on my laptop from my home office
Really? Do you feel like you've been slacking since you've been working from home?
When I was working I usually at the office I probably worked harder.
Working from home can make life easier but you should still work hard. Your co-workers still need you to put in the work and your customer deserve it.
Okay, I'm going back to work.
That sounds like a great idea. Continue working harder and I'm sure the coworkers will have no complaints.