Harare municipality signed the US$5,4 million contract with Nanotech in 2019 but the local authority has reneged.
The fuel sold by these companies failed to meet the quality standards set by Zera.
Von Kirchmann said EU exports to Harare totalled US$340 million last year, with massive scope for accelerated trade.
However, he said only 200 Zimbabwean firms were exploiting opportunities presented by a decade old pact called Economic Partnership Agreement (Epa).
Gregor’s Ghanaian partner, Edwin Obiri, said in an interview with the Independent last week that no crime had been committed in South Africa related to the Ghana case .
This push for a third term has sparked controversy, as Zimbabwe’s constitution limits presidential terms to two five-year periods, making Mnangagwa’s current term his last.