IATA has set standards for the format, content and handling of e-tickets, these are 722f/g/h for airlines, TAs, and ground handling respectively. My e-ticket receipt from aa.com complies with 722f and at the bottom of the email receipt there is a block labeled "Receipt" which has the columns "Passenger", "Ticket Number", "Fare-USD", "Tax" and "Ticket Total", followed by "Payment Type" and "Total". This is required by 722f format.

Your receipt from the TA would be in 722g format, which is similar but I don't have a current example. The ticket number must be marked and easily visible to be IATA compliant. It sounds like you don't have an IATA 722g format receipt, when TAL is required to give you one.