Vodacom Canal Walk - Poor Service

It is impossible to get through to the Vodacom shop in Canal Walk (on Lower Level - the Repair Centre). I have sat on the phone for 15min +12mins being kept on hold... on both occasions the call went through and rang and then was cut off (as if someone put the ringing phone down).. Vodacom, you need to address the poor service at this shop. Al I want to know is if you can do a screen replacement on a Galaxy Tab S2 (SM-T815), & cost & if you have stock, & how long it will take....