Horrible customer service

If I could I would give half a star. I fell behind on my rain payment but paid it up. As my initial payment date is set for the 25th I attempted to change it to the 1st as I happened to change jobs that only allow me to pay on the 1st. I called customer service several times, emails and sent text messages on Facebook only to be given a lame excuse that since I chose the 25th when I made the purchase I won’t be assisted to change the date they can’t help. The 25th is not convenient for me, it doesn’t help that my new jobs requires me to work from home therefore I need the connection but from the 26th my connection goes off hampering on my world. Even after explaining this I’m being told that I can’t be assisted to change the date cause that’s the date I chose when I made the purchase. As a customer for over 2 years I’m disappointed of this and I’m actually on the verge of changing to another device provider cause such an inconvenience isn’t working from me.