Teosyal kiss lips have gone lumpy and firm

Lips injected 3 weeks ago with teosyal puresense kiss, they were smooth and even post procedure. 10 days after they were swollen and asymmetrical, advised to let the swelling go down, this hasn't really settled very well and now the filler feels dense and lumpy. Why would it change to this? Have been advised to have them treated by the clinic with the dissolving enzyme