Can you suggest how to parse alphanumeric value starting with number or variable name with blank space

In the picture below i have parse some values coming from a third party api. There is an issue arising with a variable name when it comes to alphanumeric value starting with number (e.g 2G or 3G/4G) or variable name with blank space (e.g: RATE CUTTER) its not parsing. But the variable with name TOPUP, Romaing, FULLTT is working fine. What should i use so that the syntex consider the variable.

error in dev console parsing524×512 21.6 KB