Do you have a number? I don't have FB or anythingCan’t recommend Chris at Sneakerrehab enough:
Lives in Nuneaton and charges £15 a pair and does an amazing job. Also, does alterations so he can do things like change the colourways, or personalise them so unpicks the Gazelle and replaces it with CCFC or whatever you want.
This was the job he did on cleaning my pink Gazelle’s: