194C & 206C clash

sir actually we (Individual Assessee)get our books audited u/s 44AB.Futher we provide vehicles on hire basis to courier companies.Now our vehicles need to be parked on mthly basis resulting payment more than 1 lacs.I told the contractor to furnish pan as I need to deduct tax u/s 194C but his contention is that he will collect tax at sourse u/s 206C instead now what should I do