Hunt for an used Yamaha, Cort, Peavey, Bass Collection, Aria etc, much better and will have decent resale value if you don't like it.
Your best bet is the Facebook marketplace, just had a look and there's an old Yamaha BBN5 for £120, an Ibanez BTB for £150, an Ibanez SR370 for £110, an Epi Toby for £120 and an OLP MM5 for £140. All of those will likely be head and shoulders above the G4M cheapy, particularly the Ibanez.