Small Claims court is setup to accommodate self-representation, but in my experience it rarely gets that far.
If you have all your facts and proof together, then you can file yourself for about $100. Filing, and the subsequent serving on the other party, often gets things moving.
The dollar amounts handled in small claims court are small enough {cut off in NB is 12K}, that it is typically impractical to engage council. However, if your case is complicated, or your time short, find yourself a lawyer who practices business/contract law who can assist you.