SiriusXM Nationwide

 I have had SiriusXM for over 9 years & 6 months ago only 2 channels fade in & out Howard 100 & Howard 101. All the other channels come in perfectly with the exception of 2. The two that fade in and out are part of a primium package that is an extra charge for certain channels. Out of the primium channels only 2 fade in & out H100 & H101, the others work perfectly. I called several times, took my car in for antenna & radio inspection & in excellent condition. Called a few times after that to get the same answer they can refresh the signal & that's about it. I also have it on my cell phone & the same exact thing happens on my old Apple IPhone 6plus & now on my new IPhone 7 plus. I keep getting people in the philippens and never anyone in the USA to help me. The last SiriusXM person I spoke with told me I should contact the channel owner to get further assistance I asked who that would be and she told me on speaker phone in front of my co workers Howard Stern because their his channels that they have nothing to do with that. ??? Really are you kidding me. I then asked her if she realized what she had said and she repeated it again, verbatim. I only signed up for SiriusXM for those 2 channels. She told me that was all she could do and that was it. My co workers were puzzled by her response. I had them listen because I've had the same response on previous calls, I was just hoping I'd get someone in the States to help with this. I'm not asking for money back on taking my car in I just want this issue resolved so I can continue listening without fading in & out. It doesn't make sense why only 2 channels fade in and out when the others work perfectly fine.