Is zevit a calcium supplement?

No, not calcium. According to the manufacturer's vitamin listing, zevit capsules contain: zinc sulphate monohydrate, vitamin b1, vitamin b2 , vitamin b6 , vitamin b12, nicotinamide, calcium pantothenate , vitamin E acetate, vitamin c , Folic Acid , biotin , nicotinamide 100. The calcium panthothenate is actually a b vitamin like many of the other components. This has no significant calcium supplementation role.
Small amount calcium. Zevit is principally a b complex vitamin. It also has zinc and vitamin c. The amount of calcium is trivial.