Its really hard to tell what you have done. If the bottom end was 'round', that was the bottom of the rhizome. Heliconia often have all the roots removed after harvesting a rhizome, especially when sent through the mail, because the old roots always doe off and the plant has to resprout a new set of roots.
Those are not the flowers you are looking at. Those look like new shoots for new stems. Those should have been buried at least right at soil level. Heliconia 'flowers' come out between the leaves of individual, mature stems. Not from the base of the plant. Like this
Generally when a single rhizome is dug up and cut off the body of the main plant, it will take 12-24 months for any blooms. This is because #1 the rhizome has to establish and grow a new root system #2 Heliconia generally do not bloom *at least the larger varieties) until they are at least 12 months of age and #3 your plant has no leaves...it is not growing or photosynthesizing...it cannot produce flowers
