Inefficiency of Unilever-South Africa

I am quite disappointed with Unilever and their inefficiency and unprofessional manner in which they have managed my query. Two months ago I returned a can of Tresseme hairspray as it was of a poor quality as compared to its usual good quality. It was leaving a white residue on my hair that looked disgustingly like dandruff. They asked me to return the can to them and that they would have it tested and also refund the cost... Two months later and no response or update.