However, a spokesman for Molson Coors told APNZ: "Under the new agreement with CCA, all Molson Coors products - including Cobra - will be distributed by CCA.''
Mr Swain said he had recently organised a new shipment of Cobra, due to arrive in New Zealand next month.
The Molson Coors spokesman said a takeover date had not been confirmed but CCA has previously reported it would start distribution in "mid-2012''.
"It is surprising. I've got to go back to them now and get a timeline and find out what the hell is going on,'' Mr Swain said.
He said he had invested a lot of time in promoting Cobra, which is one of the highest selling products for Hi IQ Liquor.
CCA told investors this month that it would start distribution of a range of Molson Coors beers in New Zealand, including Coors Light, Carling, Caffrey's and Cobra.
The move is part of a larger plan by CCA to re-enter Australia's billion-dollar brewing industry by 2014.
At the company's annual general meeting, investors were told CCA's six-step plan to break back into the Australian industry would include entering New Zealand's market with "international partners''.
Molson Coors is the only partner they have revealed.