After 40 rounds and 8ish months, you're getting a good deal. A few years back I did a brief 18 months in golf retail, the number of chancers, and folks with ridiculous expectations would fear you. One woman took her son's (well worn) adidas shoes back as the lining had started to go at the heel. Yes, they're shoes, you're doing 5 miles + every time you're out, of course they will wear.
Another guy took back a packet of castle tees (yes all £1.50 of them) because they kept breaking Cost him more in petrol to return them than get his refund.
Yet another came in ranting cos he'd lost a stud which was our fault as one of the young lads had replaced his spikes, despite the fact it was a customer care gesture as we didn't offer spike replacement. I did suggest he should always check spikes himself in case they were loose. "I've never changed spikes in my life" he says. After some toing and froing I 'agreed' we'd 'replace' them, as I'm ringing the new spikes through the till "you're not charging me for more are you?"...."yes". He left, sans spikes