You should get a review and follow-up with the doctor who did the fillers for you or get a proper assessment done by an experienced aesthetic doctor. If the fillers were done recently, it may still be amenable to manual massage or reshaping to correct minor asymmetry or lumpiness.
If the fillers were done some time ago, one way is to use radiofrequency energy devices to tighten the skin around the fillers to correct minor asymmetry and lumpiness, as well as to increase degradation and break down of superficial fillers through thermal energy.
Also, if the fillers used are hyaluronic acid fillers, hyaluronidase can be injected to dissolve them. However, hyaluronidase does not work for collagen stimulator fillers like Radiesse and Ellanse, and agarose fillers like Alginess.