Injured Arm after taking Bloods

In June 2024 I had visited the Lancet branch at Life Roseacres hospital in Germiston to take my bloods, upon the needle being inserted I felt huge electric pain all the way to my palm of my hand, she immediately took it out and just said she's not sure what had happened, I have layed a complaint as this is the first time I have used their services at Life roseacres, almost a month later my arm is not getting any better rather worse, the pain is constant with swelling and all I get is a sorry for the inconvenience... It is affecting my daily lifestyle. PATHETIC SERVICE!!!