Internet troubles...

Have Century Link Dsl. Only package out here is 1.5mbps download. Past 2 weeks it has been much slower. Using the speed test on CenturyLinks sit have been lucky to see .6mbps downloads....but my upload speeds have been .9mbps. Several very annoying phone calls....thats another story...later and have gotten nowhere. Keep hearing that the modem diagnostic page is claiming 1.5 down and .87 up. Gave up on the phone calls, emailed them. Just sent them a screen shot of the last test...talk about frustrating