Need desperate help with cot to bed transition

[TrixieLox]

My 18mo has started climbing out of her cotbed so we've turned it into a bed.She's refusing to sleep in it, screaming at the safety gate until we come to her. Before this, she was going through a weird sleeping phase anyway, refusing to sleep which was unusual for her as always been a great sleeper. The transition from cot to bed hasn't been as smooth as we'd have hoped due to her climbing out earlier than anticipated. Any advice / techniques to help her sleep in her bed? She has a bedtime routine and goes to bed at 7 each night. Would really appreciate your advice! Am feeling ill and hubby working shifts so very difficult plus breaks my heart to see her cry!

*refusing to sleep, not using!

It's tricky when they start doing this my dd is 2.9 and has just started doing this after sleeping fine at first. Could you sit in the room with her until she goes to sleep? Either that or there is a rapid return technique where you just keep putting them back without talking. That was too exhausting for me tho! We also put a little Ikea cot side on because she fell out a couple of times and I think that unsettled her.