Telus downgrade from 75 to 50

[wireless]

So I have been told by telus level 2 techs that I need my Internet downgraded to internet 50 from 75. I am 6 months into a two year service agreement. I have never been able to get 75 speed even hard wired. They are telling me this gives them leeway for tv as they usually give an extra 25 mps for 25. Saying there’s issues with my wiring . He was the trying to get me to fiber which I do have wired to my house now. However this is not a option I will do as the location of the modem and ont box would be in the middle of my living room. So top it off I get less data 450 from 550 gb a month and the price is the same.
I guess my question to everyone here is can I get out of my service agreement because if this? I signed up for internet 75 and 550 mps at a specific price . I am 6 months in and they tell me I need a downgrade of service.
thanks for any info you guys can provide.



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