I understand the concern you have regarding your daughter's hearing. If the Dr who saw her ear said it was just wax and he gave drops to soften it, then Dr has done the right thing. These drops make the wax swell up and completely closes the ear canal
like a peanut which swells on exposure to water. Hence the reason for deterioration in her hearing. Continue to use the drops till u meet the Dr who will remove the wax. If there is any other concern despite was removal I'm sure it will be addressed.
I hope you found my response to be helpful and informative. If you have any additional concerns I would be happy to address them.