Logo Design

Since one & half year my company site ranked in google.com.au with high compititors, but since two weeks our website ranking still dropping day by day, site was on 3 to 4th position consistely, but now its on 16th position, we are really too worried about, also we changed meta data & content of website which also indexed by Google but still site rank has been dropping day by day, we are also doing full off page optimization since years but this time we really too worried about our business. So please share you better thought which i need to apply. Thanks Shani Lofal