Please help me out - Drobo 5N got heated and some parts were melting

This happens when the fan was not working properly till Drobo 5N was down.
The question is, is it possible to pull out my data if I am using an external reader?

If not, what is the possible option other than buying the same Drobo 5N?

Have you contacted support yet? Unfortunately there is no way to read your data except with another 5N.