Cannot get an invoice

Although the work done was acceptable, the work done was for a body corporate, they won’t start without upfront payment, but then to get an invoice to submit to body.corporate is almost impossible. The contractor would not supply invoice, called the office on Monday and Philip promised to send. Never arrived, called on Saturday and Philip answered and told ME to call on Monday, great service you take zero responsibility 1st, 2nd and 3rd request, so will have to make 4th request on Monday