ECOShield Pest Solutions Hidden Charges to cancel a month to month agreement Dallas Texas

In person salesperson visited my home to sell me a month to month pest service on 06/14/2022.  Agreed upon rate was to be $120.00 per visit (each month) but was told if at any time I'm not satisfied with service I could cancel (as it was sold as a month to month service). 

During this visit on 6/14/2022 there was a "welcome call" with their customer service department where they claim that conversation about "Annual Commitment Discount Payback" was explained.  I do acknowledge the call but I DO NOT acknowledge that was this explained to me (had I understood what this meant I would NOT have signed up for their service).

1st service was rendered on 6/24/2022 and I was charged $129.90

2nd service was rendered on 07/27/2022 and I was charged $129.90

3rd service was rendered on 08/15/2022 and I was charged $129.90 and I then decided to cancel as I noticed NO CHANGE in my pest population being reduced. 

I called 08/15/2022 the customer service line to cancel which is when it was revealed to me that I had to pay $194.85 cancellation fee. 

I attempted to dispute this with the agent, but was no successful.  The agent insisted the welcome call covered all explanation of this charge which I dispute.  To date this company refuses to refund my $194.85.