No online check in on Travelstart bookings

I purchased a flight to Durban through Travelstart. When I tried to check in online, I was unable to. I phoned the call center to query this and was told it is a code share flight with SAA so I can check in through Mango. This was not the flight I had booked , but I still tried to check in on Mango. This didnt work and I phoned Travelstart again and spoke to Denusha. She was rude, abrupt and told me I needed to arrive 90 mins prior to departure and had to check in at the airport. This is unacceptable as these are not the terms under which I bought the ticket. Denusha did not try to assist and instead was rude and unhelpful, insinuating that I should have known this because the booking said operated by Mango.<br> Based on this service and this incident, I will not be using Travelstart again.