This number is being used as part of a network of scam calls from Zimbabwe. The tactic is Called Wangiri. They make a short one-ring call to a UK mobile, then cut the call. This is in the hope that they will get a call back.
Anyone who does call back will be connected to an international premium-rate telephone line. This call will be extremely expensive. Do not make any calls to the number: +263 7 87822501