Hairdresser dyed my whole head with blonde dye...

...I thought she was just toning it.
She erased the ombre job at the bottom and pintura highlights, and my natural hair colour (light brown) lifted to a ginger blonde.
Any suggestions on how to deal with it once it starts growing out to avoid the dreaded "line" between the blonde-orange hair and the natural colour? She said to just keep dying it with blonde hair dye, but I am not enthusiastic about that. (Would lowlights in my natural colour help blend it, or make more of a mess?)
EDIT: What's worse is...she took a £5 tip (I'm in the UK) for herself from the change without even asking!!
She erased the ombre job at the bottom and pintura highlights, and my natural hair colour (light brown) lifted to a ginger blonde.
Any suggestions on how to deal with it once it starts growing out to avoid the dreaded "line" between the blonde-orange hair and the natural colour? She said to just keep dying it with blonde hair dye, but I am not enthusiastic about that. (Would lowlights in my natural colour help blend it, or make more of a mess?)
EDIT: What's worse is...she took a £5 tip (I'm in the UK) for herself from the change without even asking!!
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