I am in no position myself to advise anyone but if I were in your shoes, I would do a Master's degree instead.
It may not be an entirely feasible idea to do another Bachelor's degree, unless of course the rationale is that you would like to go into a totally different career such as law, medicine, engineering etc.
Strictly speaking, the Bachelor's degree (with the exception of law and medicine) is something that helps you open doors, that's all. Most of the skills and knowledge needed to do a specific job are learnt on-the-job anyway, and knowledge learnt in the degree per-se are maybe used only 20% of the time.
For instance, here in Singapore, it is common for people with engineering Bachelor's degrees to do marketing work.
Hence, all things considered, i.e. time needed to do another Bachelor's, plus academic fees etc, I suppose I would do a Master's degree instead?