Walmart Family Mobile Paid them but account shut off anyway! Albuquerque Internet

I received an email from Walmart Family Mobile that my son and brother's mobile phone bill was now ready, it was approximately September 19, 2015.  I went online to pay it on September 20, 2015 with my VISA card that I allow them to keep on file, but is not set up as auto-pay. It rejected my payment numerous times. I tried to call them to pay over the phone but was told they would charge me a $5.00 fee.  I figured I would call my bank the next day to figure out what whas going on with my credit card.  I tried to use my credit card to purchase gas and groceries later that day and it was rejected again.  I tried to contact my bank, but they were closed and the customer service number on the back of my VISA was unable to provide any information.  I called my bank the next day (Monday) and found out that my VISA had been compromised - that someone attempted to use it fraudulently and the bank's fraud department caught it.  They called and left a message on my house phone letting me know this, but didn't bother to call my cell.  Since it was going to take 7-10 days for a new replacement VISA I went to my online bank account and set Walmart Family Mobile up as a payee and had my bank sent off what my bank calls an ACH payment on 9/21/15.  It showed that it could take up to 6 days for them to receive - since it wasn't due until 10/5/15 I figured that wouldn't be a problem. Today, (10/8/15) my brother called me from his home phone to tell me his cell phone wasn't working.  After calling WFM several times attempting to get a line person I had to pretend that I was setting up a new line because the only option I had was to pay my bill --- which I had paid by the ACH check.  (I verfied on my bank website that they had accepted payment and had been received on or before 9/29/15).  The woman I spoke with told me that they don't accept paper checks through the mail!  I told her I have no idea how the bank sends an ACH payment, but that my account was showing that they had accepted the payment.

I think they should have notified me via email on or around 9/29/15 when my bank shows they accepted the payment by to notify me that this payment would not be accepted.  Also, when something like this happens, they should give their customers the option to get a live person to deal with something like this.  I had to call about 5 or 6 times - get disconnected because I was not going to pay something I had already paid, only to continue to get disconnected.  --- This company needs better communication methods - they also have no email set up, so I couldn't even email them to follow up.  I would not recommend Walmart Family Mobile to anyone!  I personnally use Boost Mobile as my cell carrier - and while there are times where I have a few dead spots, their customer service is spectatular compared to Walmart's.   But I guess since it's "Walmart Family Mobile" and everyone knows what crappy service Walmart stores themselves have, between trying to find an item - trying to find an employee to help you find an item, and hoping that employee speaks English --- and the manager not opening any more checkout lines (like they do at most other stores) when the lines get long - this type of service is exactly what most people expect from them!