NO PARTS EVER AT MAHINDRA MIDRAND

Why is it Mahindra Midrand NEVER have stock of spares. I run a small business using my Bolero so have to book it in on a Saturday (bearing in mind they only do services on a Sat). To date this past Sat 22 May nothing was done because there were no front brake discs. I closed my business down today (Monday) and took the vehicle back and am still waiting. Do I lose business again on Tuesday and do my staff not get paid again. Cant wait for my warranty to expire so I can use someone who actually cares. Not a happy camper