Kay,
The 24W Go charger was not the correct charger for a SP7, it is under powered. THE SP7 uses a 65W charger.
Microsoft does not recommend third party chargers. How to charge Surface - Microsoft Support
Your SP7 has a USB-C port which should support charging with a certified 60W or higher PD USB-C charger.How to charge Surface Pro 7 via USB-C? - SurfaceTip may help.