Replacement defrost heater different from original

Order Number: 2085498

GE Profile Side-By-Side
Model PSH23SGPA BS

I ordered a replacement defrost heater from you (WR51X10042) which seems to be the correct part number. However, the existing heater is a single element whereas the replacement is a two element heater.

I have temporarily installed the replacement using just one of its elements, but it is too deep for the space available and is not a proper fit. The existing single element measures 22 Ohm, whereas the replacement elements are about 45 Ohm each.

How should I proceed to get the proper repair? Is the existing 22 Ohm heater actually still OK?

Thank you, Trevor