Merge two GMB

Hey,
Whats your experience with merging two GMBs?
Got a client and they have two listings (verified the one with more reviews for them) both have almost the same name and similar images. It should be 100% obvious to Google that it is the same business and should be merged.
Should I contact Google support to merge the two (the one I have verified has 100 reviews the duplicate one 20) or is there a risk that Google might remove both of them as theyre duplicate.
Have never dealt with duplicate listings before and dont want to screw up.

Are both of them in same location? Contacting Google will result in deleting one of them.

KingKeifi said:

Are both of them in same location? Contacting Google will result in deleting one of them.

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The second one is in the house next to it for some reason.